(fencing) A tool used in electric powered fencing to detect regardless of whether a weapon has struck an opponent, which connects to some fencer's weapon by a spool and body wire. It utilizes lights and seem to notify successful, with different coloured lights for on concentrate on and off focus https://gabletoppak.com/the-growing-threat-of-marine-pollution-and-how-gabletop-cartons-offer-a-solution/