Stages Cycling Power Meter L - 105 R7000Making onboard performance analysis as easy and discrete as possible, this non-drive-side crank arm power meter is the ideal training partner for the gain-seeking rider. This Shimano 105 R7000 crankset-compatible gauge gives super-accurate output readings, using Bluetooth and ANT+ to deliver them to your compatible device for instant ride feedback. It can also be used in all weathers due to the IPX7 waterproof rating and Active Temperature Compensation technology. High Performance, Onboard Power Gauge Designed to make sure you get the most of out of every ride, this convenient training accessory can be sued on both indoor and outdoor training sessions and is powered by a long-life CR2032 battery. With Tour de France-racing pedigree, it is a proven way to raise your riding to the next level. Features: Accuracy: +/- 1.5% accurate in all conditions Compatibility: Shimano 105 R7000 crankset, Shimano Hollowtech II road drivetrains Power Range: 0 - 2500 watts Cadence Range: 20-220 rpm Water Resistance Rating: IPX7 Battery Life: 200+ hours (coin cell: CR2032) when used as a single sided meter Connectivity: ANT+, Bluetooth Weight: 15g 9approx) Buy Stages Cycling Components from Chain Reaction Cycles, the Worlds Largest Online Bike Store.