Feature: 1. DUAL 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 2. 1.6MM THICK PCB DOUBLE SIDED BOARD: Adopt 1.6mm thick PCB double sided board, sturdy and durable, possess long service life 3. LARGE HEAT DISSIPATION AREA: Amp circuit board come with large heat dissipation area, stable operation and long running time 4. STRONG 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 5. SUPPORT AC 6‑18V OR DC 9‑24V: This is a single power supply 47 amp board, supply voltage support AC 6‑18V or DC 9‑24V Specification: 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. Package List: 1 x Amp Circuit Board Note: Please use within the specified power supply voltage range.