Specification: - Color: Rose Gold - Material: ABS+TPE +Aluminum alloy - Use: Mobile Phone, Computer, Gaming, PROFESSIONAL - Play Time: 7 hours - Standby time: 100 hours - Charging time: 2 hours - Connecting interface : USB - Application : Computer, Mobile Phone - Impedance : 16ohms - MIC Sensitivity : 42+3dB. - Transmission distance: 10 meters - Cord Length: 66 cm - Bluetooth Version: V4.1 - Weight (with package): 30 g - Bluetooth protocol: HSP, HFP, AVRCP, A2DP - Function: Noise Cancelling, Microphone What's in the box 1 x Bluetooth Wireless Earphone