Sonyxer Bluetooth Headset Gear 1  (Black)

Battery:lithium : 450Mah Operational temperature: -40 to 80°C Charging time: about 2 hours Standby time: up to 100 hours Talk time: up to 10 hours Distortion:<0.1%(THD) Sensitivity: >75dB Frequency response: 20Hz-20kHz Impedance: 16Ω Bluetooth profiles: A2DP, AVRCP, HSP, HFP Operating distance: up to 10m (free space) (30 feet) Frequency range: 2.4GHz-2.48GHz Bluetooth version: V4.1 Drivers: 57mm speaker X 2 Transducer type: dynamic weight : 208g features : 1.connect with two mobiles phones charge voltage : 3.6V