Bluetooth 5.1 Headset Twins Wireless Earphones Mini Stereo Headphones Earbuds Features: 1. HiFi sound quality: Purify sound quality, make sound performance more delicate. 2. Upgraded bluetooth 5.1 version: Sound transmission is more stable. 3. Pick up and match: Out of the box automatically turn on, bluetooth automatic pairing. 4. Binaural call and noise reduction technology and HiFi quality: improve the recognition level of voice, and can easily communicate even in noisy environment. Make the call clearer and more real. 5. Mini stealth earphone, lightweight, and the ergonomic design brings you comfortable and cozy wearing experience. parameter: 1.Model:V8 2.Bluetooth specification: V5.1 3.Bluetooth Profile:A2DP,AVRCP, HFP;HSP 4.Frequency Band Range:2.402 ~ 2.480 5.Working voltage:3.2V~4.2V 6 Charging voltage:5V-1A 7.Battery capacity of the headset: 50MAH 8.Battery capacity of the storage box:300MAH 9.Transmission distance:>10M Rechargeable headphones: 4 times Cumulative call: 24 hours Accumulated music: 20 hours Noise reduction ratio: CVC8.0 10.Call time:about 4-5 h 11.Play time:about 4-5 h 12.Waterprof :IPX7 13.Charging time of headset:1 h 14.Charging time of the Charging box:1h 15.Support system:All Bluetooth devices and mobile phones Packing list: Bluetooth headset x 2 Charging cabin x 1 Manual x 1 Charging cable x 1