Specification: - Color: Black - Play Time: 6 hours - Standby time: 100 hours - Charging time: about 2 hours - Connecting interface : Micro USB - Application : Computer, Mobile Phone - Impedance : 16ohms - MIC Sensitivity : 42+3dB. - Cord Length: 66 cm - Operation Distance: 10M - Bluetooth Version: V4.2 - Weight (with package): 50 g - Function: Bluetooth, Microphone, Noise Cancelling - Battery Capacity: 100 MAh - Usage: Support bluetooth,TF card/Micro /SD card,FM radio What's in the box 1 x Bluetooth Wireless Earphone