Item Type: Digital Power Amplifier Board <br>Material: PCB <br>Chip Model: For TPA3116 (with AM interference suppression function) <br>Filter: Yes (the sound is more round and clear after filtering) <br>Adapted Power Supply Voltage: 5-27V (optional 9V/12V/15V18V/24V and other adapters, high power recommended high voltage) <br>Adapted Speakers: 30W-200W, 4Ω, 8Ω <br>Number of Channels: Left and right dual channels (stereo) <br>Bluetooth Version: 5.0 <br>Bluetooth Transmission Distance: Approx. 15m / 49.2ft (unobstructed) <br>Protection Mechanism: Overvoltage, undervoltage, overheating, DC detection, short circuit protection <br>Size: Approx. 82 x 50 x 18mm / 3.2 x 2 x 0.7in <br>Power Supply Voltage: <br>DC12V <br>8Ω speaker/12W (left channel) +12W (right channel) <br>4Ω speaker/20W+20W <br>15V 8Ω/18+18W, 4Ω/more than 30+30W <br>19V 8Ω/32+32W, 4Ω/more than 45+45W <br>24V 8Ω/38+38W, 4Ω/more than 55+55W<br>1、Using imported chip for TPA3116 solution, with AM interference suppression function. <br>2、The output audio is filtered, using high?performance filter components, with HIFI level 5.0 stereo sound quality. <br>3、The BT power amplifier with protective case supports reverse connection, overvoltage, undervoltage, overheating, and short circuit protection. <br>4、The transmission distance is up to 15 meters without obstruction, and the signal reception is fast and stable. <br>5、The power amplifier board kit is complete, including installation tools, easy to operate and use less space.1. The power switch on the board is the standby switch. After the switch is turned off, the machine is in a low?power standby state. To completely turn off the power or unplug the DC plug on the machine for a long time. <br>2. There will be enough output power only when the audio input is sufficient power, voltage, and current. The higher the power supply voltage, the higher the relative power, and the speakers with different impedances will have different output powers. In the case of sufficient voltage and current, the larger the horn's ohms, the smaller the relative sound power, please pay attention!<p>1 x Power Amplifier Board</p><p>1 x PCB Board</p><p>1 x Shell</p><p>1 x Heat Sink</p><p>1 x DC 5.5 x 2.5 Cable</p><p>9 x Screw</p><p>1 x Gasket</p><p>1 x Nut</p><p>4 x Fixed Rod</p><p>1 x Screwdriver</p><p>1 x Rotating Cover</p>