Features: It helps to extend battery life. Universal 24V applications. Prevents the main battery from discharging. The main function of the product (starting type) is to turn on, it can be used alone, it can also be connected to the controller to use, but the product does not include an additional control relay, and if the controller is connected, it is mainly used in dual battery. Specifications: Product series: automatic relay (different batches, the position of the sticker label on the product may be different, this does not affect) Contact load: high power Contact switching current: 500A Contact switching voltage: 7.8 Contact form: transformation type Rated current: 500A Protection features: waterproof type Coil power supply: 24V DC Size: 80 x 56 x 85 mm Material: Nylon + metal Color: Black Package Contents: 2 x Car Start Relay Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little