Material: Plastic Type: (ON/OFF) Complete with 500 amp Max rating: 500 amps at 12V DC Size(L*W*H): 7.2cm x 5.5cm x 8.5cm/2.8 inch x 2.2 inch x 3.3 inch Extends battery life Universal 12V applications Prevents primary battery discharge Water resistant black phenolic plastic Pins: 4 Color: Black Package Contents: 1 x 500A 12V Relay Only the above package content, other products are not included. Note: Light 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.