(fencing) A tool Employed in electric fencing to detect whether or not a weapon has struck an opponent, which connects to some fencer's weapon by a spool and human body wire. It utilizes lights and seem to inform a hit, with unique coloured lights for on focus on and off https://gabletoppak.com/the-growing-threat-of-marine-pollution-and-how-gabletop-cartons-offer-a-solution/