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Feature:
1. Perfect sound quality. It offers perfect sound quality and clear communication no matter when listening to music or making a call.
2. Compatible with most Bluetooth devices, including all Android and IOS smart phone.
3. Easy to wear, perfect for your daily life.
4. Ultra long battery life. The Bluetooth headphone supports up to 10 hours of playing music, 2.5 hours of talking with 400mAh polymer Li ion battery for one off full charge.
5. Built in Bluetooth 5.0 chip, easy to pair with your smart phones, tablets and other Bluetooth enabled devices. you can enjoy skip-free music in a 10-meter working distance.
6. Built-in HD microphone, offering crystal clear sound for hand free conversations.
7. Compatible with most Bluetooth devices, including all Android and IOS smart phone.
8. Build-In TF Slot and maximum support 32GB TF card. (Note: The TF card is not included)
9. Foldable design make it easier to carry and save your space, you can bring it wherever you want to go. (TF mode only support for MP3 format.)
10. Unique romantic LED breathing light can switch color automatically in 7 colors, you can enjoy the cool & romantic light at night.

Bluetooth version: 5.0
Bluetooth mode support: A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5
Frequency: 2.402-2.480GHz, 2.4G ISM band
RF performance: receiver sensitivity: -84dBm; transmit power up to 4dBm
Frequency response: 20 Hz-20 kHz
Signal to noise ratio: 70dB;
Total harmonic distortion rate (THD) 0.1%
Power indicator: red and blue flashing
Headphone battery: 400mAh lithium battery
Charging time: 2.5 hours
Call time: about 10 hours
Play time: 8-12 hours
Standby time: up to 20 days
Working temperature: -20 ° C -55 ° C.
Other functions: support TF card (maximum 32G, need to purchase separately) support status indicator, charging indicator display
Color: Black, Black + Red, Red + Black，White

Features:
It's a musical feast
High quality
Super long standby for 20 days
Skin-friendly comfort
Comfortable without pressing ear and make the ear comfortable
Easy folding makes going out more convenient
Wired + wireless switching at any time
Bluetooth stable clear communication
10. Match and connect
1. Keep the distance between the phone and the headset within one meter, the closer,the better.
2. Hold "reset" for a second and release when you see alternate flashing red and blue lights, at the moment the headset goes into pairing mode.
3. Turn on the bluetooth function of the phone, search for the bluetooth device, and select "B39" to match. When the connection is successful, the headset bluetooth indicator will flash slowly.

Package List:
1 x Bluetooth Headphone
1 x Audio Line
1 x Charging Cable
1 x User manual