This board does not consume power in standby mode, which improves the disadvantage of the general board with transformer DC control in standby mode. The micro-current DC control switch does not interfere with the amplifier, does not consume power when shut down, and has 2-channel over-temperature protection. Suitable for transformer amplifiers below 2500W. This delay soft board uses micro-current DC control, and the control line current is less than 0.2ma, so that standby mode does not consume power at all. There is no worry about magnetic leakage without a small transformer, which reduces the interference source for high-fidelity amplifier production. The most important point is that the board design strictly complies with safety regulations. The creepage distance of PCB strong and weak current must be 6.6MM. This product is also designed and produced according to this standard. If it is less than this distance, there may be a risk of . Please purchase it carefully for the safety of yourself and your family. Main functions:Suppress the instantaneous surge current when the amplifier is turned on, and protect your home's power supply line and the rectifier components inside the machine. Because the of Class A and high-power amplifiers have high power, low load impedance, and large power filter capacitor capacity, the instantaneous current of the amplifier when it is turned on is too large, which can easily damage the rectifier bridge and filter capacitor, causing your home circuit breaker to trip or fuse to burn out. (The color, appearance and words may be different due to different printing batches, but it not affect the use) Color: As shown Material: ABS Package Contents: 1 x soft start board 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.