Speed, Cadence & Distance Tracking The Wahoo Blue SC Speed & Cadence Sensor wirelessly captures your real time speed, cadence & distance while cycling. Third Party App Compatibility The sensor works seamlessly with multiple different third party training apps including Cyclemeter, Strava, Map My Ride & many more. Dual Technology The Wahoo Blue SC has both ANT+ & Bluetooth 4.0 capabilities that allow for wireless connection to both smartphones & GPS devices. In the Box Blue SC CR2032 battery (installed) Mounting strap Zipties Rubber mounting base Crank arm magnet Spoke magnet Quick start guide Important product info guide Specifications Physical dimensions: 3.5 x 1 x 3 inches Weight: 36g Battery: CR2032 Battery life: up to 12 months Water rating: IPX7 (waterproof up to 5ft) Wireless signal strength: up to 10ft