Product Description: Bluetooth Amplifier Board with Dual TPA3116D2 Chips, 100W+100W TPA3116D2 Chips Experience superior sound quality with this amplifier board featuring dual HiFi grade TPA3116D2 chips. It offers a wide voltage input range of DC 9‑24V, delivering a powerful peak output of 100W plus 100W at 1kHz, 21V, and 4 ohm speakers. This ensures robust and clear audio performance for your sound system. Multiple Input Methods Enjoy versatile connectivity with support for Bluetooth input, 3.5mm AUX input, and USB input. This amplifier board is compatible with a variety of devices, including smartphones, tablets, laptops, and MP3 players. Easily switch between your preferred sound input methods to suit your listening needs. Indicator Lights and Upgraded DC Socket The amplifier board is equipped with indicator lights that provide an intuitive view of the current input mode, enhancing user experience. The upgraded DC socket ensures a no-spark power connection, offering enhanced safety and reliability for your audio setup. Supports Multi Music Formats Play music from a USB flash drive with support for multiple formats, including MP3, FALC, MAV, APE, and more. For FLAC files, ensure the music bit rate is within 1500kbps, and for MAV files, the sampling rate should be within 44100Hz. The USB flash drive must be formatted in FAT32 format and have a capacity of no more than 32GB. APP Control Take control of your audio experience with the convenience of APP control. This feature allows you to switch input modes, set the amplifier board's Bluetooth name and password, and more, providing a seamless and user-friendly operation. Upgrade your audio system with this Bluetooth amplifier board, combining powerful performance, versatile connectivity, and user-friendly features for an enhanced listening experience.