The heat sink adopts aluminum alloy super large heat sink, which is beautiful, atmospheric and rapid heat dissipation. It is the close companion of fever grade chip. Chip inductors filter noise, filter signals, stabilize current and suppress electromagnetic interference. Function switch volume adjustment, power amplifier on or off Fever capacitor symmetrical capacitor design eight fever capacitors 330uf * 8 = 2640uf Chip type: tda7498 Input voltage: DC 12-36v Output power: 100W x 2 Channel: dual channel output Output impedance: 4-8 ohm Frequency response: 20Hz-20KHz color:Black Material:Metal size: 8.3 x 6.4 x 2.6CM Package Contents: 1 x Digital Amplifier Audio Board Only the above package content, other products are not included. Note: Light 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.