Parameter: Model No:BT 600 Bluetooth Profie:BT5.0,AVRCP,A2DP Range: 10M Pair name :BT 600 Transmitter mode:Red LED light Receiver mode: Blue LED light Size:32MM*17MM*10MM Features: 1.This portable, lightweight wireless audio transmitter and receiver is the ideal wireless audio solution for every situationand application 2.Transmitter mode: wirelessly transmits audio from non-Bluetooth TVs, home stereo systems or CD players to Bluetooth headsets or speakers. 3.Receiver mode: wirelessly transmits audio from Bluetooth-enabled mobile phones, tablets or computers to cable stereo, speakers or headphones. 4.Mode switching: A)First plug the product into the USB port to power up. B)When powered on, the default mode of the machine is the transmitter mode. C)Press and hold the side button for more than 3 seconds to switch to receiver mode. Press and hold to switch back to the transmitter mode. 5．Pairing and using methods AReceive mode usage methods: Blue LED flashes to indicate that it has switched to receive mode. The USB of this product is used for power supply and can be plugged into any USB interface with 5V output. For example, a mobile phone charger. Find the pairing name of the BT 600 in the Bluetooth settings of your phone. The paired successful Bluetooth light will be on. Play audio files in your phone, use the 3.5 headphone cable to connect to speakers, car audio and other Bluetooth-free devices. You can also plug in the 3.5 headphone port with a wired headset to listen to music. Bto receive mode. The USB of this product is used for power supply and can be plugged into any USB interface with 5V output. For example, a mobile phone charger. Find the pairing name of the BT 600 in the Bluetooth settings of your phone. The paired successful Bluetooth light will be on. Play audio files in your phone, use the 3.5 headphone cable to connect to speakers, car audio and other Bluetoothfree devices. You can also plug in the 3.5 headphone port with a wired headset to listen to music. 6．The unit is small and exquisite, but has powerful transmitting and receiving functions, which is convenient to carry. 7．Wide compatibility. This product is widely used in your computer / pen computer / home stereo system / headset / smart phone / MP3 player / CD player. Package Include: 1*3.5mm Aux Cable 1*2 in 1 Bluetooth Adapter 1*Use Manual