BLUETOOTH 5.0 - Bluetooth 5.0 technology provides a stable, fast connection with low power consumption. The Bluetooth signal is stronger and faster. Generally, there's no signal interference within 10 meters, making it more enjoyable to use. Pocket-sized and portable for easy carrying. No driver required; plug and play. 3-IN-1 FUNCTION - 3-in-1 transmitter/receiver: This Bluetooth adapter has two modes; it can function as a transmitter (red light) and a receiver (blue light). In transmitter mode: Connect non-Bluetooth devices like TVs, MP3/MP4 players, PCs, CD players, iPods, etc., to Bluetooth speakers or headsets. In receiver mode: Ideal for music streaming at home or in your vehicle. Bluetooth name: RT-09. WIDE COMPATIBILITY - This Bluetooth USB adapter is compatible with devices with a USB port and a 3.5mm audio jack, such as car stereos, TVs, computers, and sound systems. EASY INSTALLATION - Connect the device to a USB port for power (e.g., a USB charging port on a TV, computer, or phone charger). The device will automatically power on, displaying a rapidly flashing red light, indicating it's searching for wireless connections. Easily connect your PC, computer, or other devices wirelessly to Bluetooth devices.