Wahoo Fitness Premium Speed/Cadence SensorYou bike with your phone anyway, so why not have it collect your speed and cadence data with the Wahoo™ Fitness Premium Speed and Cadence Bike Sensor.
Store bike speed and cadence data during a bike workout. - Easily connects to most bikes. - Durable. - Speed and cadence sensors are independent so they can be placed in the best positions. Small profile: low drag. - Modifiable: can be used with recumbent bikes. - Tether is spliced and extended to fit. Wireless: ANT+ ultra low power technology license free. - 2.4 GHz ISM band operation. Waterproof up to 5 feet. Battery: 3 volt CR2032 coin cell. - Replaceable. Compatible with any ANT+ receiving device. - Signals: sends and receives up to 10 feet (unobstructed). Weight: 18 grams. - Accessories: 12 grams. - Total: 30 grams. Imported.