Features:<br /><br />* Bluetooth 4.1 version， it could transmit stable signal in high speed， build qicker connection.<br />* Equiped with 120mAh batterty， long lasting life， support up to 10h talking time.<br />* It support the simultaneous connection with two bluetooth devices.<br />* CVC 6.0 noise reduction technology， enjoy clear and pure music while running.<br />* Ergonomic design， more comfortable and cozy for long-time wearing.<br />* Intelligent voice prompt， remind you the state of the earphone， such as when power on/off， pairing/paired or etc.Specifications:General Specification  Brand  HUAST  Model  BT-54  Color  Orange， Black， Red， Yellow， Blue  Wearing Type  In-earTechnical Parameters  Microphone  Yes  Wired Control  Support  Bluetooth Version  4.1  Transmission Distance  10m  Receive Sensitivity  100dB  Impedance  32&amp;Omega;  Frequency Response  20-20kHz  Battery Capacity  120mAh，.3.7-3.9V  Charging Time (h)  3h  Taking Time  10h  Standby Time (h)  180hPackage  Included: 1* HUAST Neckband Bluetooth Earphone 1* USB cable 1* pair of earmuffs 1* manual<br /><br />