Features: brand new and high quality Designed with simple wiring connection, suitable for DIY Application of green hands. Equipped with 2 filter capacitors and huge rear heat exchanger for great performance. Equipped with silver made rotating buttons for Treble/Bass/Balance adjustment. Equipped with TDA 8944/8946 chip and 6.5 mono sound channel base for microphone port. Designed with 2x40W high power, presenting stereo sound to the greatest extent. Specifications: Material: Metal Recommended Power: for DC 12V-2A Channel Type: 2.0 Power Amplifier Chip: TDA 8944/TDA 8946 Output power: 40W+40W Size: 13x10.5 for cm/5.11x4.13 inches Approx. Note: 1.Please allow slight inaccuracy due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set of Amplifier Board