1. Bluetooth version: V5.0+EDR
2. Transmission distance: about 20 meters
3. Use time: about 4 hours
4. Standby time: about 80 hours
5. Shell material: ABS, PC
6. Transmitting frequency: 2402-2484GHZ
7. Support protocol: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3
8. Charging voltage/current: 5V/1A
9. Microphone sensitivity: -42dB
10. Charging bin capacity: 500mAh
11. Headphone: 35mAh
12. Accessories: charging compartment x1, earphone x2, manual x1, charging cable x1, ear cap x4
13. Charging compartment size: about 6.5×4.8×2.2cm
14. Headphone size: about 2.2×1.4x1cm
15. Weight: about 45g

Features:
1. Automatic connection / automatic pairing, automatic power on when picked up, pairing the two earphones with each other
2. HiFi sound quality without loss of noise reduction, earphones highly restore the original sound, shocking stereo sound quality, presenting a powerful and wide sound range
3. Ultra-low power consumption/rejection delay, about 4-5 hours battery life for both ears, low power consumption when connected
4. Binaural high-definition stereo, audio transmission quality of version 5.1 is greatly improved, high-definition sound
5. One-key control, answering, playing, booting and other functions
6. High-speed Bluetooth 5.1, fast and stable connection
7. Low-noise silicon microphone, clear voice, using noise reduction CVC6.0 digital noise reduction technology, intelligently filter the surrounding noise to make calls, clearer, and shorten the communication distance between people and music
8. The earphone adopts ergonomic design, so it will not hurt your ears for a long time.
9. The left and right ears are connected to Bluetooth separately, there is no distinction between the main and the auxiliary earphones, and you can take it and use it at any time. You can switch between single and double ears freely, and you can enjoy music with one earphone