【Versatile Bluetooth-compatible 5.4 Adapter】This M20 Bluetooth-compatible adapter supports both receiving and transmitting functions, offering high-definition sound quality for car and home use. 【Plug-and-Play TF Card Support】Easily play music directly from a TF card, providing convenient access to your personal music library. 【Extended Range】Enjoy a stable Bluetooth-compatible connection up to 10 meters, allowing for flexible placement and movement. 【Long Battery Life】With a 400mAh capacity, experience up to 20 hours of receiving time or 15 hours of transmitting time on a single charge. 【Real-Time Display】Features a digital display showing battery level and current mode for easy monitoring. 【Compact Design】Measuring just 63*31*23mm and weighing only 37.4g, this adapter is perfect for portable use in various settings. Specifications: Model: M20 Bluetooth-compatible Version: 5.4 Connection Range: 10m Battery Capacity: 400mAh Receiving Time: Approx. 20 hours Transmitting Time: Approx. 15 hours Interface: 3.5mm AUX Input Power: DC 5V/1A Charging Time: Approx. 2 hours Charging Port: Type-C Material: ABS Display: Real-time battery/mode display Dimensions: 65*32.2*18mm Weight: 37.4g (net) Functions: Receiving/Transmitting/TF Card Playback