Headphones are a symbol of human portable audio. There are two standards for mobile headsets: OMTP standard is usually called national standard, and CTIA is called international standard. Headphones are classified according to their energy conversion methods, mainly including: moving coil method, moving iron method, electrostatic type and other magnetic type. From the structural and functional methods, it can be divided into semi-open and closed; from the wearing form, there are earplugs, hanging ears, in-ear and headwear; from the number of wearers, there are single earphones and Multi-person earphones; distinguished from the sound source, it can be divided into active earphones and passive earphones; active earphones are also often called card earphones.
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i13 TWS Bluetooth 5.0 / Noise Cancelling / Comfortable Wearing / Automatic Pairing Wireless Earphone
Descriptions:
With a lightweight and compact body, wireless design, Bluetooth V5.0 technology, this earphone has superior HiFi sound quality. Equipped with a small size charging case, it is convenient to charge and easy to carry.
Main Features:
• Bluetooth V5.0 and chip QCC3003 technology protect wireless headphones from cable disasters
• Noise cancelling to filter out background noise for clear voice and enjoyable communication
• Designed according to the shape of ears, you can enjoy comfortable wear
• Automatic pairing, automatic switching, integrated with charging and storage
• Surround sound effect, clear and high quality
• 320mAh charging bin, 40mAh built-in Li-ion battery earphone
Specifications:
Driver: 15mm
Impedance: 32ohm
Bluetooth version: Bluetooth 5.0
Bluetooth use frequency band: 2.4GHz
Bluetooth distance: 10-15 meters barrier-free
Power level: class 2
Output power: 30mW
Frequency response: 20-20000Hz
Working voltage range: 3.0V-4.2V
Microphone sensitivity: -42dB
Powerful noise cancellation circuit
NOTE
Adjust volume function is not available for Android phones
Type: In-Ear
Material: ABS
Main Functions: Bluetooth
Application: Sport,Working
Cable Length (m): 0m
Compatible with: Computer,iPhone,Mobile phone
Connectivity: Wireless
Driver unit: 15mm
Frequency response: 20-20000Hz
Impedance: 32ohms
Bluetooth: Yes
Bluetooth Version: V5.0
WIFI: No
Battery Type: Built-in
Package weight: 0.134 kg
Product size (L x W x H): 5.00 x 4.00 x 2.30 cm / 1.97 x 1.57 x 0.91 inches
Package size (L x W x H): 10.00 x 10.00 x 3.30 cm / 3.94 x 3.94 x 1.3 inches
Package Contents: 2 x Headset, 1 x Charging Box, 1 x Chinese / English Manual, 1 x Charging Cable
