These K-10D relays can be driven from a low-level GPIO input and be effectively used where a relay output is required from an open collector output. These handy boards provide a simple method to interface a low-level control output from a control system such as the FSR Flex Gpio ports to higher level loads such as a low voltage screen controller. They can also be used to reverse control output logic if necessary. The units use captive screw terminals for fast, easy wiring and include onboard LEDs that monitor the relay state. The K-10D "5 pack" includes the "snap away" relay modules and hook and loop mounting strips.