Item Type: Bluetooth 5.0 receiver and transmitter 2 in 1 Product Model: KN322 Technology: Bluetooth 5.0, A2DP, AVRCP (only in receiver mode) Operating Range: Maximum 10m/33ft (with no barrier) Matching Name (Receriver mode): KN322 Transmitter Mode Indicator: Red LED light on Receiver Mode Indicator: Blue LED light on Product Width: Approx. 32mm/1.26inch Product Weight: Apporx. 3.2g Suitability: Suitable for your computer, laptop, home stereo system, headphone, smart phone, MP3 player, CD player etc. Transmitter Mode: Wirelessly transfer audio from a non-bluetooth TV, home stereo system or CD player to bluetooth headsets or speakers. Receiver Mode: Wirelessly transfer audio from a phone, tablet or computer that supports bluetooth to wired stereos, speakers or headphones. Mode Switching: a. Firstly plug the product into the USB port to turn on the power. b. When the time after power-on is within 10 seconds, you only need to re-plug it once for switching modes. c. When the time after power-on exceeds 10 seconds, you need to re-plug twice for switching modes. Note: If this product has been used for more than 10 seconds, it will remember this mode. It will be the last mode the next time you turn it on. No built-in battery, powered by DC 5V USB interface: Plug in the USB power supply, the red light will be on in the transmission mode, the red light flashes when pairing, and the red light is always on after the pairing is successful. Plug in the USB to turn on the power, the receiving mode is blue light, the blue light flashes when pairing, and the blue light is always on after the pairing is successful. Usage: a. Receive Mode: Used for home audio, wired headset, car audio, etc. Usage: Turn on the product and confirm the receiving mode (blue light), open the bluetooth settings in the phone and tablet, search for the pairing name: KN322 for pairing, connect the home audio, earphone, car audio with 3.5 audio cable and wait for it. b.Transmission Mode: Used on TVs, computers, MP3 players and other devices without bluetooth. There is no need to install a driver, but you need to connect with a 3.5 audio cable. It can only transmit audio, not data. Usage: Turn on the product and confirm the transmission mode (red light). The product will automatically search for nearby bluetooth headsets, bluetooth audio, bluetooth receivers and other devices. 1、This transmitter and receiver 2 in 1 bluetooth adapter supports for bluetooth 5.0, the operating range is maximum 10m. 2、In transmitter mode it can wirelessly transfer audio from a non-bluetooth TV, home stereo system or CD player to bluetooth headsets or speakers. 3、In receiver mode it can wirelessly transfer audio from a phone, tablet or computer that supports bluetooth to wired stereos, speakers or headphones. 4、Light in weight, small in size, can be put in your backpack or laptop bag, easy to carry. 5、The operation is easy, there is no need to install drivers before use. It can only transmit audio, not data. 1 x Receiver/Transmitter 1 x Audio Cable 1 x Manual