DUB-PWR spindle-based unit measures left side power to calculate total wattsProven Quarq reliability and accuracyLong battery life (400+ hours) to power a season of ridesUser replaceable AAA lithium batteryDUB bottom bracket adds durability and simplicityWaterproof (IPX7 waterproof to 1 meter for 30 minutes)Compatible with All Sram Road WIDE DUB BBs, except Ai175DUB WideBlackDirect MountUPC/EAN/GTIN: 710845886348