Trackmate compatible Personal Transponder.    This is a personal transponder for the excellent Trackmate Infra Red Lap Scoring System. Will not work with Irace any other Lap system.  Every PT has its own unique ID This is NOT a Trackmate product but a Kamtec compatible  It does not light up when plugged in  You can buy the whole system or any part of it from Kamtec . Please see other ad. You will receive one PT ( personal Transponder ) as in pic but with a unique number  If in any doubt please contact us .    Trackmate compatible Personal Transponder.    This is a personal transponder for the excellent Trackmate Infra Red Lap Scoring System. Will not work with Irace any other Lap system.  Every PT has its own unique ID This is NOT a Trackmate product but a Kamtec compatible  It does not light up when plugged in  You can buy the whole system or any part of it from Kamtec . Please see other ad. You will receive one PT ( personal Transponder ) as in pic but with a unique number  If in any doubt please contact us .