1、TPA3116D2 CHIPS: This amplifier board features dual HiFi grade TPA3116D2 chips, providing a wide voltage input range of DC 9‑24V, with a peak output of 100W plus 100W at 1kHz, 21V, and 4 ohm speakers. 2、MULTIPLE INPUT METHODS: Amplifier board supports Bluetooth input, 3.5mm AUX input, USB input and so on. Compatible with smartphones, tablets, laptops, MP3 players and many other devices. You can easily switch between preferred sound input methods. 3、INDICATOR LIGHTS AND UPGRADED DC SOCKET: This amp board includes different indicator lights for a more intuitive view of the current input mode. The upgraded DC socket ensures a no spark power connection for enhanced safety and reliability. 4、SUPPORTS MULTI MUSIC FORMATS: When playing music from a USB flash drive, MP3, FALC, MAV, APE and other music formats are supported. For formats such as FLAC, the music bit rate should be within 1500kbps, and for MAV, 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. 5、APP CONTROL: This Bluetooth power amplifier board supports APP control, which allows you to switch input modes, set the amplifier board's Bluetooth name and password, etc. Experience the convenience of operating. Item Type: Bluetooth Amplifier Board Material: PCB Power Supply: DC 9-24V Peak Power: 100W Plus 100W Amplifier Chip: TPA3116D2 x 2 Bluetooth Version: 5.1 Sound Inputs: Bluetooth, AUX, USB 1 x Bluetooth Amplifier Board 1 x Screwdriver 1 x Adapter 1 x User Manual