1DUAL CHANNEL: Dual channel design, op amp is compatible with multiple specifications of dual op amps, you can change different op amps, there are different op amps to choose from, you can choose according to your own preferences 21.6MM THICK PCB DOUBLE SIDED BOARD: Adopt 1.6mm thick PCB double sided board, sturdy and durable, possess long service life 3LARGE HEAT DISSIPATION AREA: Amp circuit board come with large heat dissipation area, stable operation and long running time 4STRONG NON INTERFERENCE: The amp circuit has been repeatedly debugged, so that the original layout on the PCB board is reasonable and simple, and the non interference ability is strong 5SUPPORT AC 618V OR DC 924V: This is a single power supply 47 amp board, supply voltage support AC 618V or DC 924V Item Type: Amp Circuit Board Material: PCB Purpose: Single power supply 47 amp board Channel: Two channels Power Supply Voltage: AC 6-18V or DC 9-24V 1 x Amp Circuit Board Have a great time shopping!