Function: this switch module can effectively protect your battery when power failure automatically.Automatic design: you will no longer need to care it after installation.Premium material: anti-rust,wear-resistant,sturdy and solid, and can provide long-term service.Light in weight: Easy to carry and store,convenient compatible with daily use and replacement.Easy to install: simple and practical to install, one-handed operation.Material:PC+Metalcolour:As ShownPackage Contents:1 x YX-X804 Power Protection Relay ModuleOnly the above package content, other products are not included.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.