BLUETOOTH 5.0 - Bluetooth 5.0 technology provides a stable and fast connection with low power consumption. The Bluetooth signal is more stable and faster. Generally, no signal interference will occur within 10 meters, more enjoyable to use. Pocket size, portable to carry around. No driver required, plug and play. 3-IN-1 FUNCTION - 3-in-1 Transmitter Receiver: Bluetooth adapter, there are 2 modes, it can be a transmitter (red light) and even a receiver (blue light). In transmitter mode: TV, MP3/MP4, PC, CD player, iPod etc. non-Bluetooth can be paired with Bluetooth speakers or headsets using this Bluetooth transmitter. In receiver mode: It is ideal for music streaming at home or in the car. Bluetooth Name: RT-09. BROAD COMPATIBILITY - This Bluetooth USB adapter is compatible with devices with USB port and 3.5mm jack such as car stereos, TVs, computers, and audio systems. EASY INSTALLATION - Connect the device to a USB port for power supply (e.g., a USB charging port on a TV, computer, or mobile phone charger), the device will turn on automatically, and the device will turn on the red light and flash quickly, that is, enter the wireless search state, can easily let your PC, computer or other devices connect wirelessly to Bluetooth devices.