Specifications: Model: K5 Color: Black,Blue,Red Wearing type: In-ear with ear hook Feature: Wireless Headphone Function: Answering phone, Bluetooth, Microphone Connectivity: Wireless Connecting interface: Micro USB Application: Mobile Phone, Sport Power supply: Built-in rechargeable battery Bluetooth version: V4.1 Bluetooth mode: Hands free, Headset Battery:75mAh Charging time:1-2 hrs Talking time:about 5hrs Music time:about 4hrs Standby time:100hrs Transmission distance: 10 meters Charging power supply: AC input 110-240V DC output 5V Transmission power: Class2 Radio frequency: 2.402-2.480GHz Noise Reduction: CVC6.0 Noise Cancellation Technology Charging interface: Micro-USB Support: HSP, HFP, A2DP AVRCP