Keep fishing after sundown with the Clam Night Bite Tip-up Light. Simply attach this small, lightweight device to your tip-up's flag post, and its bright red LED will illuminate the moment the flag comes up, signaling a strike. Designed with a fiber-optic tape extension that is visible at extended distance when deployed. Environmentally-friendly non-mercury trigger switch; handy on/off button eliminates the need to remove the device for daytime use. Uses two CR2032 coin batteries (included). For fishing in low-light periods or at night Attaches to your tip-up flag post Bright red LED with fiber-optic extension Illuminates when the flag comes up Highly visible from afar Environmentally-friendly switch Convenient on/off button