Mikroe Motion 2 Click is based on the Panasonic EKMC1607112 PIR motion sensor used as a human motion detector. The Toshiba TLP241A photo relay is also featured on the board. It is used to provide reinforced galvanic isolation for the external signals used to drive some external high power electronic equipment when motion is detected. It allows up to 40V between the SSR contacts in OFF state, and currents up to 2A while in ON state. This is thanks to a very low ON-state resistance.