Description <br> Digital amplifier has a higher overload capacity than analog amplifier, and it wont cause crossover distortion, ient inter modulation distortion and you dont have to worry about the loudspeaker internal resistance <br> It supports Bluetooth V4.0 audio input and DC 8V to 25V voltage input <br> Using NE5532 pre-amp, and TDA7492 chip for dual channel of 50W+50W power output <br> Sound quality is very good by using this audio power amplifier module <br> Applicable speaker impedance are 4, 6, 8ohm, great for turning normal speaker into Bluetooth speaker <br> <br> colour:Photo color <br> Material:ABS <br> size:8 x 5 x 2cm <br> <br> Package Contents: <br> 1 x Amplifier Board <br> <br> Only the above package content, other products are not included. <br> 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. <br>