Features: Bluetooth-compatible 5.0 technology: Supports BLE5.0, providing faster connection speed and more stable transmission distance. Multi voltages power supply: It can operate at 5V or 12V voltages and adapt to various environmental requirements, such as car, homes, or portable devices. MP3 playback function: Build in MP3 decoding function, which can directly read sound files from USB drive or memory card. Radio function: Integrated FM radio module, users can easily listen to radio stations, increasing flexibility in use. Small design: Its small size makes it easy to integrate into car, home, or portable speakers, making installation convenient. Easy to use: intuitived control panel designs, easy to operate, user-friendly, quick to change between different sound sources. Large power output: Provides sufficient power to drive multiple speakers, ensuring strong and powerful sound performances. Widely applicable: Suitable for car sound systems, portable sound systems, DIY projects, and various other sound occasion. Specifications: Main Material: Metal Size: approx. 75x50mm/2.95x1.97inch Package Includes: 1Pc Bluetooth-compatible Amplifiers Decoding Board 1Pc Remote Controller 1Pc Power Wire 1Pc Line note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.