Specification: Wireless Type: Bluetooth Plug Type: Wireless Active Noise-Cancellation: Yes Style: Ear Hook Frequency Response Range: 8-25000Hz With Microphone: Yes Connectors: USB Sensitivity: 123dB Volume Control: Yes Resistance: 50 Ω Control Button: Yes Battery capacity: 90mAH on one side of the headset Charging power: AC input 110-240V DC output 5V Transmission power: Class2 Wireless frequency: 2.402-2.480GHz Call duration: about 8-10 hours Playtime: about 8 hours Standby time: 200 hours Charging time: 2 hours Noise reduction: Built-in CVC6.0 noise cancellation technology Operating range: 10 meters Charging interface: Micro-USB Version: V4.1 Chip: CSR 8635 solution Support: HSP, HFP, A2DP AVRCP Voice: Support Package included: 1 x Wireless earphone 1 x Charge cable 1 x Manual