Smart Pill ON-OFF Micro is potential free relays which can be installed in the wall box or similar enclosed installation to turn ON or OFF one or more appliances ex. Electrical panel ovens, garage door motors etc. The device can be controlled with Bluetooth from app, Smart Switch or push switch. You can use them as relay to select either ON/OFF or you have the option to select pulse mode, to give pulse to ex. a motor for a garage door.