Pi Modules - PM_108 - High Power Relay Kit for PiCoolFan4. The PiCoolFAN4 can be optionally equipped with this High Current Relay. A Green LED light up to inform the user the Relay is ON. Content • High Current Relay• 40 pin Stack Header• 4 x 17 mm spacers• 4 x 25mm screws/nuts• 1 x 3 way Terminal Block
