(fencing) A tool used in electrical fencing to detect whether a weapon has struck an opponent, which connects into a fencer's weapon by a spool and body wire. It employs lights and seem to notify a success, with unique coloured lights for on target and off goal hits. In summary, https://gabletoppak.com/from-plastic-bottles-to-gabletop-cartons-a-step-toward-solving-the-plastic-pollution-crisis/