ROTOR INSPIDER POWER METERA POWER METER FOR ALL KINDS OF BIKESMeasuring power is a great way to see if you're improving during your training. Power meters are designed to measure your strength during your pedal stroke, and higher power most likely means you're going faster. The Rotor INspider Power Meter is a lightweight spider integrated power meter that delivers a reliable, versatile and advanced watt measurement system. It is compatible with Q Rings oval rings and all Rotor modular cranks. The INspider has a rechargeable battery with coated electronics and strong sealing for water resistance. It is designed to sample combined left-right data to precisely record power output, cadence, torque 360, Optimum Chainring Angle, and recommendation of Optimal Chainring Position.FeaturesCompatible with Q Rings oval rings and all Rotor modular cranksLightweight spider integrated power meter that delivers a reliable, versatile, and advanced watt measurement systemIt samples combined left-right data to precisely record power output and moreConnection type: ANT+, Bluetooth SmartBattery life: 200 hoursMaterial: 7075 aluminum alloy | Rotor INspider Power Meter 110x4