V10 Feature: 270 degrees rotating design, suit for left and right ear. bluetooth V5.1 chip,stable singal transmission. Bluetooth transmission distance: 10 meters. Creative hook design and only 15g weight,stable and comfortable. Support adjust volume and change music Battery capacity of the headset: 140mAh Noise Reduction: CVC 8.0 Working voltage: 3.7V Charging voltage: DC5VCharging Time: about 1 hours Talking time: about 20 hours Music time: about 20 hours Frequency response: 20 - 22kHz V10 Products include: 1x Bluetooth headsets 1x Charging cable 1x User Manual 2x Ear cap About us: Dear customers, we are a professional manufacturer of Bluetooth devices such as Bluetooth adapters, Bluetooth headsets, Bluetooth speakers, etc. We will test all products before