Get both the RMP Speed and Cadence Sensor in one convenient bundle.RPM Cadence Sensor The Wahoo RPM Cadence Sensor is a wireless, magnet-less, lightweight, cadence sensor
Bluetooth 4.0 Smart enabled
Sensor is easy to install & connects wirelessly to your iOS device
Displays your cadence data right on your iPhone (through the free Wahoo Fitness App or your favorite cycling app – including Strava & MapMyRide)
Only 7 grams
Two mounting options included: (1) mount with double sided 3M tape, or (2) use the silicone sleeve and mount with zip ties
No charging required: oeprates on a coin cell battery for up to 2 years without ever taking it off your bike
LED lights flash to let you know that you`re connected & ready to ride!
Universal Fit: RPM will work with any bike
Works with iPhone 4s, 5, 5s, 5c, iPod Touch (5th generation), the new iPad (3rd and 4th generations)

RPM Speed Sensor

Dual band Bluetooth Smart (4.0) / ANT+ cycling speed sensor
The Wahoo RPM speed sensor is the sleek, magnet-less solution for capturing cycling speed data
Easily mounts to your bike’s front wheel hub, and the Bluetooth 4.0 and ANT+ dual band technology
Allows you to connect to and display data on both smartphones and GPS bike computers
Tracking speed data has never been this easy
This sensor with an App combination transforms your iPhone, iPad, iPod touch or Android device into a powerful cycling computer
Durable and easy to use
Small with low drag profile
Sends and receives signals up to 10 feet unobstructed
Waterproof up to 5 feet (IPX7)
Replaceable 3 volt CR2032 coin cell battery
Wireless: Bluetooth Smart/ANT+
Compatible Devices: iPhone 4S & newer, iPad 3 & newer, iPod Touch 5th. gen & newer, Android Samsung S3 & newer, HTC One, plus select LG, Motorola, Nexus and Sony models