Boxed Flasher
Thermal Flashers Thermal design uses heat build-up to flash circuit on and off. Features an audible click, alerting driver that a directional signal is engaged. Generally used in older model year vehicles. Operates correctly under variable load - flashing the designated vehicle lamps only; or additional lamps when a trailer is in tow. Does not indicate lamp outage Must buy 10 or more for whelesale prices.