USB Wifi Dongle -Car Bluetooth Receiver Highlights Generic Brand Car Bluetooth Receiver Description: Powerful Bluetooth IC, strong compatibility, support A2DP V1.2 stereo profile. Clip Design: Mini size with clip design, portable, can let you carry them anywhere you want. Standard 3.5mm Plug: Metal material, detachable two-way male to male 3.5mm audio connector, compact and easy to carry. Built-in microphone: support Bluetooth hands-free calling Widely used: Suitable for mobile TV, MP3, MP4, speaker, Bluetooth headset, laptop, car speaker and other devices with 3.5mm audio jacks. How to use: System status: Power on/off: long press MFB for 3 seconds Volume up: short press VOL+ Volume down: short press VOL- Switch language: double click MFB in pairing status Music control: Play/Pause: Short press MFB Previous song: VOL - long press for 2 seconds Next song: VOL + long press for 2 seconds Phone control: Answer call: short press MFB when playing call Refuse to answer the phone: press MFB when calling Reminder: double click MFB button, then short press MFB to cancel dialing Led light shows: Boot pairing: red and blue lights flash alternately Status connection: blue light flashes slowly (5 seconds 1 time) Low voltage: red light flashes (0.5 seconds 1 time) specification: Material: plastic Bluetooth version: 5.0 Frequency range: 2.4 GHz Profile: A2DP Transmission range: up to 10m/33ft I/O: 3.5mm female jack, mini USB female port Power supply: DC 5V Charging time: about 30mins Working time: about 4h Size: 1.4* 1.5*5.8cm/0.5*0.6*2.3""(L*W*H) Package includes: 2pcs Bluetooth receivers 2pcs USB power cables 2pcs 3.5 jack input mm Instruction manuals 2 pieces