Features: This selflocking relaies module offer single button bistable design for effortless start stop controls, ensuring performances with microcontroller based stability and not false triggering, for robust automation applications. Featuring double sided PCB, highly power voltages regulator for steadies operations, heat dissipation holes for durability, reverse polarity protections, and multiple voltages option (5V, 12V, 24V), this relaies module handles loads up to 250V 10A or 30V 10A . for electronics hobbyists, enthusiasts, and developers working with development board accessories to create projects like sensors integrations and controls systems. for scenarios such as automated testing setups, industrial equipment controls, and expanding sensors modules with low levels compatibility for enhanced functionality. With built in tests buttons and external support via wiring terminals, this module provide expansion and user friendly installation for seamless integration into diverse electronic assemblies. Specifications: Materials: circuit board Size: 5x2.5cm Power supply voltages: 5V, 12V 24V(optional) Load: 250V 10A or 30V 10A lifespans: 1million times Package Includes: 1PC SelfLocking relaies Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.