Adopting professional audio VU drive IC, which contains root dynamic compression circuit, effectively avoid small signal pointer, large signal, the phenomenon of pointer to render. This IC with mute function, Mute function feet will get a low level at the moment you turn it on, for avoiding pointer overload. Using AC12V power for supply circuit, more convenient using. Using double-sided circuit board, for ensuring that the fastness of wire terminals, with fastness. Bonding pad, not easy to loose. Driver board design with beautiful and reasonable layout, without any interference and self-excited phenomenon. Rated voltage:AC 12V Diameter of locate holes: 3mm Colour: green Material: ABS Size: 55x66mm Package Contents: 1 * Driver Board 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.