Features: Experience seamless wireless auditory with bluetooth-compatible 5.4 Transmitter Receiver 2 in 1, featuring low latency and stable connectivity for double modes to convert not bluetooth-compatible devices into wireless ready systems. This portable adapter includes a card slot for direct music playback, clicking mode switching, while its built in mic ensuring clear calls during drives. Ideal for commuters, travelers, and home users seeking to upgrade car stereos, TVs, headphones, or corded speakers with modern bluetooth-compatible 5.4 compatibility. Enjoy wireless in cars, airplanes, or living room—stream music from phones to car speakers via RX mode or transmit TVs auditory to bluetooth-compatible headphones effortlessly. Lightweighted fits discreetly in any setups, delivering hifi sound for music, movies, or calls across multiple devices without compromising portability. Specifications: Component: ASS. Dimensions: 34x14.7x54.8mm/1.34x2.17in Weight: 53g. bluetooth-compatible transmission distance: 10meters. Working voltages: 5V. Color: black. Power supply mode: battery power supply (200mah). Transmission: 24Mbps Working frequency: 2.4MHz Package Includes: 1PC Car bluetooth-compatible adapter note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.