Function: Support reading MP3 songs in TF card or U disk. Treble, bass and master volume can be adjusted independently. Built-in Bluetooth receiver and FM radio function. With AUX input port, can be connected to PC/Phone/CD. Microphone input and guitar input, adjustable reverb. Support AC 110V/240V or DC 12V voltage. Parameters: Product: Class D audio amplifier Model: TB01 Amplifier IC: HT338 Decoder chip: JL6951C (large IC, non-headphone chip, small IC) Input voltage: DC12V or AC110V-240V Output power: 1*60W or 2*30W (other powers can also be customized) Output impedance: 3-4 Recommendation: 4R/30-80W speaker Channel: A: Mono Colour: Black Material: Plastic Note: Different factory batches, if there is a slight difference, it not affect the use Package Contents: 1 x TB02 amplifier board 1 x remote control 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. The measurement allowed error is +/- 1-3cm.