Campagnolo eps magnetic power strap v2v3the campagnolo eps magnetic power strap v2v3 is a magnetic strap that can be used to switch off the internally mounted power unit simply wrap this band around the seat tube when not in use and the power is turned off it also doubles as a wristband when youre out on the bike features simply wrap this band around the seat tube when not in use and the power is turned off doubles as a wrist band when youre out on the bike buy campagnolo components fro