With compact portable design, it is the most mini Bluetooth headset;High performance stereo Bluetooth headset, small, lightweight and stylish Built in HD and Sensitivity microphone.No lights after connection.Idea for in car calling or working use. Perfect for Stealth Listening or watching at work. It can be connected with two smartphone at the same time.The wireless range up to 10 meters on open air.The headser will be connect automatically with a phone paired previously.With Listening to music,calling,voice prompt functions. Compatible with any smartphone with bluetooth. Compared with the conventional bluetooth headset, charging speed is increased by 50%, save your charging time. This bluetooth headphone looks fashionable.It is in-ear and invisible,Perfect for Listening to Music at work.With it,play games, watch movies, watch TV, listen to music and so on. Pairing: Press the power button of the headset for 5~8 seconds until you see the Blue & Red Light blinks alternately,if you can't pair the bluetooth,please check if your phone has connnected with other bluetooth devices.If so,then disconnect it and try again.If still can't pair,please restart your try again. Note: Language switch: If you change the language to Chinese by accident,please do as below. 1.Power the headset off; 2.Turn on the item about 2 seconds until the there is a voice prompt and the blue light flashes; 3.Press on the button again for about 1 seconds,then the language will be changed to Chinese. Specifications: Bluetooth version:V4.0+EDR Transmission range:10m Bluetooth profiles:Hands free/Headset Radio frequency:2.402-2.480GHz Support A2DP:music playback (audio output: 35mW, Play/Pause) Charging Power:AC input 110-240V DC output 5V (charging time about 2 hours/charging voltage 3.7v/working current<15mA) Battery type:50mA rechargeable lithium battery Long using time: 4 hours talk time/music playback 3 hours/standby time 120 hours Intelligent voice prompts prompted the state of equipment/to cable Noise MIC:special top silicon Marks Wearing styles:Ear/Stealth headphones patented product Dimensions:27mm X 17mm X 13 mm/1.06" X 0.63" X 0.52" Package Included: 1 x Mini Bluetooth headset 1 x USB Charging Cable 1 x User Manual