Features:<br /><br />1. IPX6 Waterproof Bluetooth Headset， you could enjoy music in the rainning day or shower time.<br />2. 100mAh battery capacity， long standby time， 7-8h talking time and 5-7 music time.<br />3. It support simultaneous connection of two bluetooth devices.<br />4. High resolution， stereo effect， put you personally into the music party.<br />5. Intelligent power display for IOS system.Specifications:General Specification  Brand  MB  Model  Z4  Color  Black， White  Wearing Type  In-ear  Line Length  0.6MTechnical Parameters  Microphone  Yes  Wired Control  Support  Bluetooth Version  CSR 4.1  Transmission Distance  10M  Receive Sensitivity  106dB  Impedance  32&amp;Omega;  Frequency Response  20-20000Hz  Battery Capacity  100mAh  Charging Time (h)  Approx 1h  Taking Time  7-8h  Working Time (h)  5-7h  Standby Time (h)  240hPackage  Included: 1* MB Z4 Bluetooth Earphone 1* USB cable 1* pair of earhooks 2* pairs of earmuffs<br /><br />