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The PowerCal is the world’s first-ever power meter calculated from heart rate. At the time of its release it was an incredible innovation combining two important training metrics: heart rate and power. And after all these years, the PowerCal remains as one of PowerTap's most popular products for a good reason – athletes of all kinds trust it ride after ride.

Features

Compatible with Strava Running and Cycling GPS app

Compatible with Wahoo Fitness app

600 hours of operation per battery with ANT+ (400 with Bluetooth)

Signal Transmission: Bluetooth Smart  (Cycling Power Service, Heart Rate Service, Device Info Service) or ANT+ (2.4 GHz)

Operational Temperature: 0-40C/32-103F

Battery Type: CR2032

Battery Life: 400 Operational Hours (Bluetooth); 600 Operational Hours (ANT+)

The PowerCal is not a waterproof device and should not be submerged in water

PowerCal BLE is compatible exclusively with the PowerTap mobile application on iPhone 4S or higher. 

PowerCal ANT+ is compatible with android and iPhone/iPad devices with use of appropriate ANT+ adapter key

PowerCal ANT+ is not compatible with cervos (little yellow computer) or older grey indoor cycle consoles.