The Bluetooth Smart Speed/Cadence Sensor uses Bluetooth Smart connectivity to wirelessly transmit information to a Bluetooth Smart Ready device, like the iPhone 4s or later so you can use your smartphone and an appropriate app to track your workout. The Speed/Cadence Sensor works with many iPhone cycling apps likeBioLogic BikeBrain for iPhone.
Works with iPhone 4s or later and the latest Android phones running Android 4.3.
Measure your speed and cadence, all from one compact device
Bluetooth (4.0) Smart — get real-time data wirelessly, no dongles required
Works with Bluetooth Smart Ready devices, including the latest iPhone and Android smartphones
Energy-efficient — approximately 700 hours of use from one battery
Works with many cycling apps, including BioLogic BikeBrain for iPhone