Features:<br /><br />1. Imported CSR8645 chip， APTX lossless transmission， Bluetooth 4.1 version and EDR technology， it could build faster connection easily.<br />2. Built-in 100mAh Lithium Polymer battery， long lasting life， it support 7-8 hours music time， and the standby time up to 180 hours.<br />3. Ergonomic design， soft earmuffs and removable earhook， lightweight， more comfortable for long time wearing， suitable for doing sport.<br />4. IPX4 waterproof， it could protect the earphone from the damages caused by sweat， rain or etc.， ensures the security of earphone.<br />5. Equip with high clear microphone， DSP noise reduction， it could isolated from the noise efficiently， provide you clear phone call.<br />6. This earphone support simultaneous connection with two Bluetooth devices. Besides， it could compatible with more than 99% Bluetooth devices.<br />7. Intelligent voice prompt， it could indicate you about the real-time state of the earphone， such as low battery， power on / off and etc.<br />8. It could be used with computer by the USB cable， let you have more practical product in life.Note: Ensure the high efficiency of the battery， it is suggest that the first charging should be kept for 3-4 hours (even the blue light on).Specifications:General Specification  Brand  UVOKS  Model  W2  Color  Blue， Red， Black  Wearing Type  In-earTechnical Parameters  Microphone  Yes  Wired Control  Support  Bluetooth Version  V4.1+EDR  Transmission Distance  10m  Receive Sensitivity  93dB  Impedance  16&amp;amp;Omega;  Frequency<br />  Response  20-20kHz  Battery Capacity  100mAh， 3.7V  Charging Time (h)  1-2h  Music Time (h)  7-8h  Standby Time (h)  180hPackage  Included: 1* UVOKS W2 Bluetooth Earphone 1* USB cable 1* Manual 2* pair of earmuffs<br /><br />