3-in-1: Integrated Bluetooth audio transmitter and receiver with 3.5mm Aux jack, making it more convenient for you to use a Bluetooth adapter. In receiving mode, you can directly use the adapter's built-in microphone to receive audio. Long Range Reception: The Bluetooth connection is stable enough to receive signals within 33 feet. Bluetooth 5.0: Bluetooth 5.0 ensures strong signal transmission, low latency, high sound quality, and low noise. Suitable types: computers, TVs, projectors (transmitting mode)/speakers, headphones (receiving mode) BT-6 transmission mode red light: audio input, transmitted to Bluetooth speakers or Bluetooth headsets through Bluetooth; generally suitable for: computer TVs. BT-6 receiving mode blue light: audio output, connected to a mobile phone and output to a stereo or car without Bluetooth; generally used in stereos or cars. Technical Parameters Bluetooth version V5.0 RF Power +4DBM Bluetooth distance 10 meters MAX Frequency response 20-20KHz Battery specifications 1003035(1050MA) Product size 80x46x13mm Package list: 1*audio transmitter