1. TPA3116D2 is a class D power amplifier IC with very high index parameters. The highest modulation frequency can reach 1.2MHZ, and the high-power output distortion is less than 0.1%. 2, with AUX and Bluetooth two audio input methods, two in one. 3. The potentiometer adjusts the volume, with a switch, which is convenient to control the volume, which is very suitable for DIY speakers. 4. It adopts copper DC female head and fence type terminal, which can withstand large current, does not generate heat, does not damage the wire, and is easy to wire and not easy to short circuit. 5.0 Bluetooth version, higher transmission efficiency and longer transmission distance. Product name: HIFI level filter 2 x 100W bluetooth digital power amplifier board Material: PCB+Metal Colour: Black Product Model: -1002 Chip solution: TPA3116D2 (with AM interference suppression function) With or without filter: with LC filter (the sound is more round and clear after filtering) Adapted power supply voltage: 5~27V (9V/12V/15V/18V/24V and other adapters are optional, high voltage is recommended for high power) voltage: 12V-8 speaker/24W (left channel)+24W (right channel), 4 speaker/40W+40W 15V-8/36W+36W, 4/ 60W+60W 19V-8/64W+64W, 4/ 92W+92W 24V-8/76W+76W, 4/ 110W+110W Adapter speaker: 50W~300W, 4~8 Number of channels: left and right dual channel (stereo) Bluetooth version: 5.0 Bluetooth transmission distance: 15 meters (unblocked) Protection mechanism: overvoltage, undervoltage, overheating, DC detection, short circuit protection Tip: There will be enough output power only when the audio input is sufficient and the power supply voltage/current is sufficient. If the power supply voltage is higher, the relative power will be higher. Speakers with different impedances will have different output powers. In the case of sufficient voltage and current, the larger the ohms of the speaker, the smaller the relative sound power, please pay attention! Product size: 84 x 52 x 24mm Package Contents: 1 x Bluetooth amplifier board 1 x screwdriver 1 x terminal 1 x DC cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing.