Bluetooth earphones-i21-ISK Series-Dongguan Haijun Technology Co., LTD

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Bluetooth earphones-i21

Bluetooth chip: AD6973

Bluetooth version: V5.3

Sound channel system: true stereo

Working frequency: 2.402-2.480GHz

Supporting protocols: HSP, HFP, A2DP, AVRCP

Transmission distance: 10 meters

Transmission power: Class 2

Response frequency: 15~20000Hz

Speaker unit: Φ 10MM

Charging input standard: DC 4.75-5.25V/1-40MA

Earphone battery: 3.7V lithium battery, 40mAh

Charging compartment battery: 3.7V lithium battery, 400mAh

Charging time: approximately 2-3.5 hours (charging case+headphones)

Headphone working time: approximately 5 hours

Charging case charges headphones approximately 3 times

Keys: Touch

Material: ABS

Color: black

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Product Description

The product uses AD6973 V5.1 specification, operates in the 2.4G frequency band, with a frequency range of 2402~2480MHz, Class II RF power level, supports Bluetooth communication protocols such as A2DP V1.3, HFP V1.5, AVRCP V1.5, SPP V1.0, BDR/BLE, etc

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

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Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

Compared with wired earphones, wireless earphones have little difference in sound quality. Wireless earphones are more convenient, mainly because the middle line is replaced by radio waves.The wireless headset is divided into three parts: the first part is the sound source, the second part is the receiver.

Inquire

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