Sport Wireless Bluetooth In-Ear Neckband Bluetooth Headset. Specifications:- WIRELES : 4.1 Talking Time : Up to 7 Hours Music Time : Up to 4 Hours Standby Time : Over 120 Hours Charging Time : 1 Hour Charging Type : Micro USB Charging Power : DC5V 70mAh Transmission Distance : 32ft.(10m) Output Power : 3mW x 2 Sensitivity : 102dB at 1kHz Impedance : 160hm Frequency Range : 20Hz-20KHZ
