ITEM NAME:4 Channel SSR Solid State Relay High-low Trigger 5A 3-32V For Arduino UNO R Y5Q6 4 Channel SSR Solid State Relay High-low Trigger 5A 3-32V For Arduino UNO R Y5Q6 Power supply: 3-32VDC Trigger: high-low trigger 3-32VDC relay switches (ON), 0-0.5V relay off (OFF) Load current: 5-220V DC 5A (DC only) Board Size: 68.5mm x 71mm, height: 25mm Positioning hole spacing: 63mm x 65.5mm, aperture: 3.1mm Color:black Material:CCL Package Contents:1 x 4 Channel SSR Solid State Relay High-low Trigger Module 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.