100% brand new and high quality Using FR-4 double-sided circuit boards; Using high-quality solid-state relays 5A; The input and output are using KF128-3.81 Terminal Block, wiring more convenient; Use SS8050 1.5A high current transistor for switching transistor, quality is more stable; The board has four screw holes. Size:(L*W*H)6.89*7.10*2.28cm/2.71"*2.80"0.90" Quantity:1Pc Performance parameters: Power supply: 3-32VDC (wide voltage power supply) Trigger: high level trigger, 3-32VDC relay switches on (ON), 0-0.5V relay is switched off (OFF) 0.5-2.5 volts unknown state Load current: 5-220VDC 5A (DC only) Wiring Port Description: DC +: positive power supply (3-32VDC) DC-: negative CH1: trigger terminal (3-32VDC high level trigger active) Note: Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Included: 1 x SSR Solid State Relay Module