Power meter with sensors on both sides compatible with Shimano® pedal bodies (model nos: PD-R8000, PD-R7000, PD-6800, PD-R550 and PD-R540). With Cutting-edge cycling technology to make the most of each pedal stroke, the Assioma is extremely accurate with precise watt measurement thanks to years of careful research and development. Experience impressive ease of use, precision and reliability with no protruding elements or interference while you're outo on the road. Integrated and rechargeable, get at least 50 hours of battery life with a single charge.