Features:1. Multifunctional (5 in1) ~ can be used as an earphone， music receiver， car aux bluetooth，Hi-fi bluetooth as well as PC microphone:Earphone:1) You can receive/dial a call handsfree even you are driving -- Just press the multifunction key，then you can enjoy your music /call and drive in safety.2) Voice Dial & Redial， can remember the last phone number.Music receiver:Connect it with your audio with a 3.5mm audio cable， then you can enjoy the music in your phone or computer freely.Car aux Bluetooth:Connect it with your car aux， and you can enjoy the music in your phone.Hi-fi bluetooth:Connect it with your Hi-fi with a 3.5mm audio cable and an RCA cable， then you can enjoy the high quality stereo music.PC microphone:Connect it with your notebook or desktop， then you can chat online with your friends. 2. Supports two bluetooth cell phones at the same time. 3. Designed with a back clip， you can nip it on your clothes， which is convenient for you to listen to music or receive a call while driving. 4. Quick-pair technology for easy pairing with Bluetooth-enabled cell phones. 5. Its working distance is up to 10 meters. 6. Suitable for sports， household， office and driving.Specifications: 1. Type: stereo 2. Bluetooth version: Bluetooth V3.0+EDR 3. Compatible with Bluetooth V4.0， V3.0V2.1V2.0 4. Operation range: 10m (about 30 inch) 5. Talking time: about 7 hours 6. Standby time: about 140 hours 7. Plug of charger: EU plug 8. Color: Black/WhiteInstructions: Step 1: There will be a red LED light up when you connect it to power. Step 2: Then the LED will be blue when it is fully charged. Step 3: Press and hold the MF button until the LED flashes in blue. Step 4: Activate Bluetooth function in your equipment， such as cell phone. Step 5: Find the Bluetooth headset device ‘IS901' in your phone list. Step 6: Connect them. The blue LED will flashes once it is paired successfully.