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Capacitive microphone has the advantages of ultra-high sensitivity, instantaneous response fast, extremely wide frequency response, ultra-low touch noise, etc., but it is relatively resistant to construction and is afraid of falling and damp. If you have a very good radio environment and need to record high quality human audio, a condenser microphone is the right choice

Moving coil microphone has low noise, no need to feed power, easy to use, stable and reliable performance, relatively cheap price, but transient response and high frequency characteristics than capacitor microphone. If you are a beginner and have a poor radio environment and a lot of noise, a moving microphone is the best choice

Microphone the hardware configuration of DSP chip, in fact, that is, digital processing chip, to beautify your vocals, and of course effect according to various concrete algorithm & hardware collocation is different, if you did care about "beautification" to note any chip sound CARDS with built-in microphone sound card can realize real-time ears back, at present the common market the microphone all the built-in sound card and chip, generally do not need to worry about, of course, there are some microphone really need their configuration independent sound card, it need to pay attention to oh interaction interface Aux use audio line, advantage is universal, Weakness is voice is not clear the Type - C has higher data transmission capacity, also means that the sound will be more clear, disadvantage is the support for universal life life not actually related to degree of use, generally according to the official state reduce 1 to 2 hours to estimate the actual microphone the customized function of noise reduction some microphone to cater to a particular scenario, introduced the function of noise reduction, some can effectively avoid the interference of sound, will certainly lose some voice recording reduction & clear put some microphone integrated small horn, anytime, anywhere can be hi sing more equipment matching equipment matching let family k song is no longer difficult

Handheld game consoles, referred to as handhelds, are also known as portable game consoles, portable game consoles, or portable amusement instruments. Refers to a small and portable game console that can run electronic game software anytime and anywhere. At present, some mobile phones have added entertainment and game elements, so that the boundary between mobile phones and handhelds has become increasingly blurred.
Handheld games originated in 1976, the Mattel Electronics Handheld Games series developed by the American Mattel Company. The first product on the market is called Mattel Auto Race, which is the first handheld ancestor that used LEDs in video games.
Handheld games generally have a short process and a fast pace. Because its purpose is for people to entertain in a relatively short period of time (such as waiting for a car or queuing), it will not have a complicated plot like a general video game; at the same time, due to the limitation of hardware conditions, the screen of general handheld The sound is not as good as the home gaming hardware of the same period.
With the development of the times, modern handhelds have made great progress in many aspects such as game plot, picture quality, and music, and have also brought a better gaming experience to the majority of players.

The noise reduction function, because of the design of a larger over-ear earmuffs, also allows this headset to obtain a good passive noise reduction function, using AMS noise reduction chip, which can realize the active noise reduction function. Wearing, using a wrap-around design, the protein leather earmuffs are wrapped with breathable sponge, and the four-dimensional micro-suspended earmuffs design makes the wearing experience more balanced.

The issue of sound quality is a very professional issue. In fact, most people don't understand it, especially on some earphones that are not very different. Non-professionals can't hear it. Ordinary people just listen to music and play games normally with headphones, and don't have too high requirements for sound quality. The sound quality is clear, the resolution is better, and the details are richer. According to the current headset market, high-quality headsets are more expensive in the market, especially some brands of headsets are updated relatively quickly. If you don’t pursue perfection in all aspects, it is not recommended to make a new one. Buy, except of course local tyrant players. Of course, you can also buy cost-effective products at lower prices, especially for some wooden ears.

Due to the design and wearing relationship of the headset, it is better to protect the ears than the in-ear headset, and it is more comfortable to wear. Moreover, the atmosphere and spatial positioning are better than those of in-ear headphones. The sound quality of the headset is powerful and has an immersive effect. The resolution of the headset is better, the details are rich, and the tiny signals can be reproduced clearly. Good sound field description ability, wide sound field, accurate and stable instrument positioning, enough information in the sound field, no feeling of hollowness. There is no obvious compression and fatigue in the dynamic, with a good sense of speed, no distortion or little distortion at high volume. Because the headset is an over-ear type, it can isolate noise to a certain extent, and it is less difficult to achieve noise reduction. For many people with noise reduction needs, the headset is the best cost-effective choice, wireless and The in-ear type needs more money to achieve high-quality noise reduction than the headset.

The card reader is produced with the digital camera, but its use is no longer limited to the digital camera, but has expanded to more fields.
The card reader, as the name suggests, is a device for reading data, but it not only supports data reading but also data writing. The initial design idea is mainly to make up for the defects of digital camera data output. Since the USB interface was not popular in the early days, the output ports of digital cameras were all connected to the serial port of the computer. Since the data transmission speed of the serial port was very low, it would take a lot of waiting time if these data were copied to the hard disk. , Therefore, the card reader came into being. With the development of digital products such as MP3 and PDA, the development of card readers has been strongly promoted. The standard 256M or 512M flash memory of MP3 is obviously not enough to meet our needs, so adding 1G or higher flash memory has become our standard configuration, but if we want to copy MP3 songs to the flash memory, we can only play through MP3. At this time, we need a dedicated connection, driver and software to complete, so the portability of MP3 players is much worse, and if we use a card reader at this time, there is no need for MP3 playback. With the intervention of the device, you can directly store MP3 songs on the flash memory, so that MP3 becomes more convenient to use.

Mobile phone batteries are energy storage tools that provide power to mobile phones. Mobile phone batteries generally use lithium batteries and nickel-metal hydride batteries. Mobile phone batteries generally consist of three parts: a battery cell, a protection circuit, and a shell. "MAh" is the unit of battery capacity

Regarding the "activation" problem of lithium batteries, many claims are: the charging time must exceed 12 hours, and full charge and discharge are repeated three times to activate the battery. This statement of "the first three charges must be charged for more than 12 hours" is for rechargeable batteries in the 1990s. The nickel-cadmium batteries at that time had a memory effect and needed to be fully charged to ensure battery capacity. The mobile phone uses a lithium ion battery, which has no memory effect. Generally, it can be fully charged in 2-3 hours, which is sufficient. If the first three charging and discharging of the new battery can really reach 12 hours or more, it will cause great damage to the battery, and may cause the battery to swell or even burn. Fortunately, both the mobile phone and the charger have protection circuits. When it is charged to 100%, it will automatically power off, and it will not continue to charge when plugged into the charger. However, it is better to unplug the charger at this time to prevent the charger's protection circuit from overcharging in case a problem occurs, causing serious damage to the battery materials and affecting the capacity and life of the battery. Generally, the charging method described in the mobile phone manual is the standard charging method suitable for the mobile phone.

Remove parts
Remove the tape and battery from the camera before storing the camera after use. As long as the video tape is loaded into the camera, the tape will be led out by the camera's strap system, and the video recording part of the camera is in working condition. If the tape is not taken out before storage, after a long period of time, the tape that is pulled out will loosen and fall off the traction mechanism, which may cause the tie and cause mechanical failure the next time it is used. When storing video tapes, keep them away from heaters and other heat sources, not too close to strong magnetic fields, and store them upright in the original packaging box. If the battery is installed on the camera for a long time, it will consume power even if the power switch is turned off. Excessive battery discharge will affect its service life. If the battery is not used for a long time, charge and discharge it every six months.

Pay attention to moisture
Put the camera in a sealed plastic bag before entering the room, and take it out when the standby device is at the same temperature as the room. The head of the camera is a vulnerable part, and its life span is not only related to the material of the head and the quality of the tape used, but also closely related to the humidity of the air in the environment. The higher the air humidity, the faster the video head wears out. Generally, the life of the head is the longest when the relative humidity is 40%. Therefore, the humidity of the environment where the camera is used and stored is most suitable to be kept at about 40%. Remove from the camera. As long as the video tape is loaded into the camera, the tape will be led out by the camera's strap system, and the video recording part of the camera is in working condition. If the tape is not taken out before storage, after a long period of time, the tape that is pulled out will loosen and fall off the traction mechanism, which may cause the tie and cause mechanical failure the next time it is used. When storing video tapes, keep them away from heaters and other heat sources, not too close to strong magnetic fields, and store them upright in the original packaging box. If the battery is installed on the camera for a long time, it will consume power even if the power switch is turned off. Excessive battery discharge will affect its service life. If the battery is not used for a long time, charge and discharge it every six months.

Stay away from the magnetic field
Since the camera part uses the photoelectric conversion principle and the video part uses the electromagnetic conversion principle, the strong magnetic field and the strong electric field will affect the normal performance of its performance. In severe cases, it will cause image distortion and sound distortion. For this reason, the camera should be kept away from strong magnetic objects or objects capable of strong electromagnetic induction, such as televisions, speakers, induction cookers, transformers, etc., during work and storage.

Don't get caught in the rain

If you have to use it outdoors on rainy days due to shooting needs, you must take measures to protect the camera from rain, such as covering the camera with a plastic bag and bringing an umbrella. Once the camera accidentally enters the water, remove the battery immediately. The faster the better, do not turn on the camera while testing whether the camera can still work, because most of the water-ingressing machinery is damaged because of this operation. If the water is very clean and the amount is not large, you only need to place the camera in a dry, ventilated, dust-free place for 2-3 days before turning it on.

Dustproof is necessary

Dust falling on the lens will affect the clarity of the camera, and will increase the inertia of the adjustment switches and knobs. The magnetic head and tape move at relatively high speed during shooting. The dust on the magnetic head or tape will damage the head like sand And tape. In order to prevent dust from entering the camera and polluting the movement, drum, viewfinder, liquid crystal screen, and lens, effective dust-proof measures must be taken. For example, when shooting in a sandy environment, cover the camera with a transparent plastic bag, or make a simple dust-proof belt to cover the body. When you carry the camera, you should put the camera in a special bag or box. When you stop shooting, you should always cover the lens cover and install a UV lens in front of the lens. It can effectively prevent dust and raindrops from entering the lens.

Pay attention to shock

When carrying and using the camera, pay attention to shock and drop resistance. Take out the battery tape when traveling to avoid violent vibration of the camera, such as putting the camera in the rear luggage compartment of a car. Severe vibrations and external impacts will damage or even deform camera parts. Do not use a tripod to take selfies on uneven ground or crowded places to prevent the corner stand from being knocked down by tourists, and try not to let children operate the camera.

With the continuous improvement of the requirements for power supply quality, safety, reliability, convenience, immediacy, special occasions, and special geographical environment, the contact-type power transmission method is increasingly unable to meet actual needs.

The wireless charger is a device that uses the principle of electromagnetic induction for charging. Its principle is similar to that of a transformer. By placing a coil at the transmitting and receiving ends, the transmitting end coil sends an electromagnetic signal to the outside under the action of power, and the receiving end coil receives the electromagnetic signal. Signal and convert electromagnetic signal into electric current, so as to achieve the purpose of wireless charging. Wireless charging technology is a special way of power supply. It does not require a power cord, relies on electromagnetic wave propagation, and then converts electromagnetic wave energy into electrical energy, and finally realizes wireless charging.

New electronic products, especially portable electronic products such as digital cameras, mobile phones, and tablet computers, are being used more and more in people's work and life, and their matching chargers also use traditional wired chargers. However, the compatibility and versatility of wired chargers are relatively poor, and it is inconvenient for users to carry and charge. At the same time, post-disposal treatment increases environmental pollution. Therefore, it is extremely urgent to provide users with more reliable, convenient, convenient and timely charging equipment. The development of wireless technology makes it possible to transmit radio power, and the research and development of wireless chargers will also meet user requirements.
There will be three main forms of battery charging in the future: visual charging, smart charging and wireless charging.

Headphones are not inserted into the ear canal and are different from earphones. It is composed of two parts, a signal transmitter and a headset with a signal receiving and amplifying device. The transmitter is connected to the signal source. You can also connect a pre-stage or headphone amplifier before the transmitter to improve the sound quality and adjust the tone.

Wireless headsets generally refer to headset systems that transmit signals by infrared rays, and cordless headsets refer to headset systems that use radio waves to transmit signals.

The biggest advantage of the in-ear type is that it saves electricity, and ordinary mp3 can be driven, and then it can avoid environmental noise. After all, the ears are blocked while listening to music. The main reason for the poor bass of the headset is that the sound unit reduces the cost, and some headsets have strong bass, but need computer CD and other equipment to drive, and the mp3 drive does not have the bass effect.