Fulfill Your Portable Audio Input DIY Project Desires Without Sacrificing Power Output! Featuring a powerful 2 x 40W amplifier, this board ensures clear and immersive sound reproduction for all your audio needs. Make your own multimedia wireless Bluetooth amplifier or portable speaker with this pre-tested and pre-assembled 2 x 40W amplifier board. The all-in-one design enables you to make smaller projects if space is an issue. Add a Dayton Audio LBB battery board to your DIY project for long lasting portable play time.? One feature of the all-in-one board design is a built-in Bluetooth 5.0 module, allowing you to connect your devices wirelessly and stream your favorite music. The built-in microphone enables you to take phone calls through the amplifier, plus it enables you to record your voice if a flash drive is installed. Say goodbye to tangled wires and hello to convenience! Additionally, the FM radio function lets you tune in to your favorite radio stations, keeping you updated with the latest news, music, and entertainment. It's perfect for those who enjoy the traditional broadcasting experience. With the built-in media player feature, you can easily playback audio files from various sources such as USB drives or SD cards. This versatility ensures that you can enjoy your music library without any hassle. So why settle for anything less when you can have it all in one board? Experience the joy of seamless connectivity, versatile audio playback, and the ability to optimize your sound with our Bluetooth, FM radio, media player, and amplifier board. Upgrade your audio projects today and enjoy the perfect sound reproduction you deserve! Note: FM reception requires a short piece of antenna/hook up wire soldered to the board. Extend the included antenna wire for best reception. Remote requires 2 x AAA batteries sold separately.? ? Remote's power button puts the amp board in standby mode. 8 ohm speakers draw very little current when in standby mode so they work best in battery operated projects. Install a power switch to prevent any current draw. 1. Main functions 1. Dual decoding supports MP3, WMA, WAV, FLAC, APE lossless format music; 2. Amplifier 2*40W, can connect 2 40W speakers at the same time; 3. Voltage range 7V-25V, current not less than 2A 4. Support Bluetooth call function, Bluetooth version 5.0; 5. Support recording function; 6. Digital color screen display; 7. Support MMC/SD/MMA and other cards, support USB interface (U disk); 8. Power-off memory function; 9. Support 10-meter infrared remote control operation; 10. Support external audio source input LINE IN; 11. Support FM radio, search frequency band (87.5MHZ-108.0MHZ); 12. Buttons: six buttons for multi-directional control, REC / REPEAT / VOL- / AUTO / VOL+ / MODE; 2. Detailed button operation 1. REC: Long press the REC button to start recording, long press the REC button again to cancel the recording function and play the recording file; when recording, you need to connect a storage device, such as a USB flash drive or TF card; 2. REPEAT: Press once for the single song loop function, press again to cancel the single song loop, and play in sequence; 3. PREV button (previous song): In MP3 mode, short press VOL- for the previous song, long press for volume reduction; in FM mode, short press for up one station number; in Bluetooth mode, short press for Bluetooth previous song. 4. AUTO button (play/pause): In MP3 mode, short press AUTO for play/pause; in FM mode, short press for play/pause, long press for automatic channel collection and storage; in Bluetooth mode, short press for play/pause. 5. NEXT button (next song): In MP3 mode, short press VOL+ for the next song, long press for volume increase; in FM mode, short press for down one station number; in Bluetooth mode, short press for Bluetooth next song. 6. MODE button: Switch between USB / SD card / FM / audio input / Bluetooth functions in turn. III. Recording function description 1. Long press the MODE button to start recording, long press the MODE button again to cancel recording and play the recording file; 2. When recording, it is necessary to connect a storage device, such as a USB flash drive or TF card;