The INPEAK 105 R7100 PowerCrank-E TWiN2 Power Meter Crankset gives road and gravel riders dual-sided power data in a Shimano 105 FC-R7100 crankset. Its refreshed TWiN2 system uses extra strain gauges on the crank sides for more data points and better reading quality. With ±2% accuracy, active temperature compensation, ANT+ and Bluetooth Low Energy support, and a rechargeable battery, it gives you clear power data for structured training.Key Features and Benefits: Dual-sided TWiN2 power measurement: The TWiN2 system measures left and right leg output, so you can see how each side contributes to total power. This gives you a fuller view of your pedalling load, which helps you train with better balance and control. Extra strain gauges on the crank sides: The refreshed design adds more measuring points to the crank, which helps the power meter read force from more areas of the crank arm. This improves data detail, so each effort is tracked with greater care. Integrated Shimano 105 FC-R7100 crankset: The power meter is built into a proven Shimano 105 road crankset, so it keeps the clean fit and reliable feel of the original chainset. This gives you power data without adding a separate pedal or spider-based unit. ±2% measurement precision: The system is made to give steady power readings within a clear accuracy range, so training zones and effort levels are easier to trust. This helps you pace rides, intervals, and tests with more confidence. Active temperature compensation from -5°C to +50°C: ATC adjusts the measurement as riding temperature changes, so heat and cold have less effect on accuracy. This keeps your power data stable across wet rides, cold starts, and warm climbs. ANT+ and Bluetooth Low Energy connection: The power meter sends power, cadence, and ride data to compatible head units, watches, phones, and training apps. This makes it easy to link your crankset with your current setup and track data in real time. Rechargeable 110mAh Li-Po battery: The built-in battery gives up to 90 hours of use and charges with the included magnetic USB cable in around 2 hours. This reduces battery waste and keeps the unit simple to maintain between rides. IP67 sealed low-profile housing: The compact case is made to resist water and dirt, which helps protect the electronics during road and gravel use. This keeps the power meter neat, durable, and ready for year-round riding. Clear power data helps you train with purpose. The TWiN2 system adds left/right balance, cycling dynamics, torque effectiveness, and pedal smoothness data, so you can review more than total watts. This helps you refine pacing, check form, and make better use of each training ride.Choose the INPEAK 105 R7100 PowerCrank-E TWiN2 Power Meter Crankset for accurate dual-sided data, clean Shimano 105 integration, and simple rechargeable use.Specifications of the Power Meter:Measurement precision: ± 2% Power measurement range: 20-2000 W Cadence range: 20-200 rpm Weight: 10 g (INPEAK device) Case tightness: IP67 Manual zero-offset calibration: Yes Temperature compensation: Yes Gyroscope + Accelerometer: Yes Torque Effectiveness: Yes Pedal Smoothness: Yes Cycling Dynamics: Yes (TWiN2) Balance L/R: Yes (TWiN2) Operating temperature: from -5°C to +50°C Storage temperature: from -20°C to +50°C Battery specifications:Battery type: "Li-Po, rechargeable "Battery capacity: 110 mAh Battery autonomy in use: max. 90 hours Battery autonomy in sleep: max. 6 months Battery autonomy in ShipMode: max. 24 months Charging time (0% -> 100%): 2 hours Low battery notification: Yes Battery charging temperature: from +5°C to +40°C Battery lifetime: Less than 20% capacity loss after 300 full cycles. Approximately 6 year lifetime. Required charger: 5VDC, 1000mA (not included)Software specifications:Software update from INPEAK MANAGER App: Yes Modification of “Scale Factor”: Yes Zwift Compatible Mode: Yes ANT+ Compatibility: Yes Bluetooth Low Energy Compatibility: Yes Auto sleep: Yes Auto wake-up: Yes Package contents:Crank with integrated power meter USB charging cableBrief instruction manual Sticker setDevice data card