ITEM NAME:DC 12V 1-CH Bistable Self-Locking Relay Expansion Circuit Board Module P3C4 DC 12V 1-CH Bistable Self-Locking Relay Expansion Circuit Board Module P3C4 Product Name : Bistable Latching Relay Module Model : SRD-12VDC-SL-C Coil Voltage : DC 12V Channel : 1 Channel Contact Voltage : AC 250V/125V 10ADC 30V/28V 10A Fixing Hole Dia : 3mm/0.12 icnh Fixing Hole Center Distance : 45 x 21mm/1.7 x 0.83 inch(L*W) Size : 50 x 26 x 17mm/2 x 1 x 0.67 inch (L*W*H) Color : Blue Material : metal Weight : 20g Package : 1 x Bistable Latching Relay 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..Color : Blue.