With automatic reconnection and multi-device pairing, this adapter remembers your paired devices for quick and hassle-free connections. Simply plug it into your car, TV, MP3 player, PC, speakers, or home stereo to instantly convert them into Bluetooth-compatible devices. Enjoy high-quality music or late-night shows without disturbing others by connecting your Bluetooth-compatible headphones or speakers to the transmitter. No need to worry about charging, as the Firefly turns on automatically when you start the engine or turn on the speakers. Its extremely portable and lightweight design makes it perfect for various situations and uses. Say goodbye to tangled wires and enjoy wireless audio freedom with the Bluetooth-compatible 5.0 Transmitter Receiver. Item Name: Adapter Material: ABS Interface: USB/AUX Is It Plug And Play: Plug And Play External Power Supply: No External Power Supply Transmission Rate: 100(Mbps) Effective Working Radius: 10(m) Bluetooth-compatible Standard: 5.0 Working Frequency: 2400 MHz Features: Automatic Reconnection, Plug Play, Low Latency Size Details: L: 3.2cm/1.26", W: 1.7cm/0.67", H: 0.85cm/0.33" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Adapter