Bontrager Digital Cadence Sensor
For use with the wireless Node computers, the Cadence sensor mounts onto the chainstay of your bike to provide the rider with the next level of measurement for training. If you don't have a Trek road bike with a DuoTrap compatible frame, this is the sensor you need. Simple and easy-to-follow instructions come with the sensor and combined with a Node series monitor, you'll find it a cinch to setup your bike for cadence. Included with the sensor is a band magnet that slips over your crank arm to measure the RPM on your cranks. 

ANT+ Wireless Communication
For the more serious weekend warrior, techno geeks or competitive cyclists, the Bontrager Node series will appeal with their digital Ant+ wireless Com system that is more reliable and accurate than the standard anologue wireless computers on the market. A big advantage of digital wireless computers is that they're not affected from electrical interference like tram lines, electricity wires or even a high-powered night light on your handlebar, so they stay reliable and accurate regardless of the conditions. The other advantage of this communication system is that it is compatible with any other Ant+ device, such as PowerTap hubs and Quarq cranks, so your Node computer is able to link up to these devices to provide you with power output on the readout. Just simply hold the 2 side buttons on the monitor and it will seek out the signal from that device to link them up. Nice!

The Bontrager Digital Wireless Sensor features:

• ANT+ enabled, 2.4gHz digitally coded transmission
• Compatible with: Node 1 and Node 2 monitors
• Straps onto frame chainstay
• Measures cadence (Pedal RPM)
• Includes mounting bolt and crank cadence band magnet