VOSAVO Wireless Bluetooth Headset Magnet Earphone with Hand-Free Calling, Bulit-in-Mic, Extra Bass Stero, Lightweight and Sweatproof Prefect for Gym, Running {Assorted Colour} General Function: Answering Phone,Bluetooth,Microphone,Multi connection function,Song Switching,Voice control,Voice Prompt Language: English Material: ABS,Metal,TPU Model: GZ05 Type: In-Ear Product Details Charging Time.: 1.5H Compatible with: iPhone,iPod,Mobile phone Connecting interface: Micro USB Connectivity: Wired and Wireless Impedance: 32ohms Music Time: 4H Sensitivity: 102 ± 2dB Standby time: 180H Talk time: 4H Extended Function Bluetooth: Yes Bluetooth distance: W/O obstacles 10m Bluetooth protocol: A2DP Bluetooth Version: V4.1 Battery Information Battery Capacity(mAh): 85mAh Li-ion Battery Battery Types: Built-in