To suit 1/10 scale models car or truck shells. Simple single LED wired to a 6v JR connector. This light is very bright. Brilliant if installing a side search light or simply buy two and use them for super bright headlights. This set would be powered by the receiver any 27mhz / 35mhz / / 40mhz AM/FM or 2.4ghz which must be running by an esc or have a 6v DC input if using two servos for nitro models. JR connector installed.