Product name: 2.0 channel Bluetooth audio power amplifier module Product model: ZK-XPSM Bluetooth version: 5.0 (unobstructed, 15 meters) Input method: AUX+Bluetooth Number of channels: 2.0 channels (left channel + right channel) Amplifier chip: TDA7498E Adapter power supply: DC12~32V (less than 9V undervoltage protection, 12V power supply can also be supported) Adapter speaker: 30-200W, 4-8 ohm Output power: left and right channels less than or equal to 150W Protection mechanism: anti-reverse connection, undervoltage, overheating, overcurrent, short circuit protection Colour: Black Material: plastic Size: 119 x 70 x 21mm Package Contents: 1 x 2.0 channel Bluetooth audio power amplifier module hint: When the audio signal input is large enough and the power supply voltage/current is large enough, there will be enough output power! The higher the power supply voltage, the greater the output power, and the smaller the speaker impedance, the greater the output power! Please make sure that the power of the adapter power supply is greater than the actual working power of the amplifier! Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.