(fencing) A device used in electrical fencing to detect regardless of whether a weapon has struck an opponent, which connects to the fencer's weapon by a spool and human body wire. It utilizes lights and audio to inform successful, with distinctive coloured lights for on concentrate on and off concentrate https://gabletoppak.com/the-growing-threat-of-marine-pollution-and-how-gabletop-cartons-offer-a-solution/