Features:1. Wireless Bluetooth headset, compatible with Bluetooth enabled devices, such as iPhone, iPad, HTC, Lenovo, Samsung, Tablet PC, etc. 2. 4G Bluetooth 3.0 EDR, support HSP/HFP/A2DP/AVRCP, connect two Bluetooth equipments at the same time.3. Built-in microphone, voice prompt power on/off and pairing, support voice dial for iPhone. 4. Enhanced noise reduction, good choice for listening music, watching movie, talking on the phone, etc. 5. Multifunctional key allows you power on/off, answer/hang up/reject/redial the last number, pause and play. 6. Build-in rechargeable li-battery, charge via USB cable for 2~3 hours. 7. Standby time up to 250 hours, can work for about 10 hours continuously. 8. Light weight, length adjustable hinges, comfortable to wear. 9. fashionable appearance.   Specification:Bluetooth: 2.4GHz Bluetooth 3.0 EDR Frequency response: 20-20,000Hz Transfer Distance:33FT/10M(No Walls Between the cellphone and this bluetooth headset,otherwise it maybe cause delay of the bluetooth signal)   Play/Talk: 10hours Easily charge via USB port    Low Battery notification    Volume /- Button Track Forward/Backward Buttons   Adjustable Earpiece Placement Built-in Microphone, answer to the phone calls when paired with mobilephone. Size:175x200x45mmHow to use: Power on: keep pressing Multifunctional key until you see the blue LED shine. Power off: keep pressing Multifunctional key until you see the red LED shine.   Pairing: First, please make sure the headset is power off and the Bluetooth devices is within 10m. Second, press Multifunctional key for 5-6 seconds until blue and red LED shine by turn. Third, activate Bluetooth of the device you want to pair, search and select Headphone Device in the Bluetooth list. Fourth, After pairing succeed, the blue LED of the headset shines twice or three times every 4 seconds.Package included:1 x Bluetooth Headset 1 x USB Charge Cable 1 x Instruction Manual