Say goodbye to zip ties! The DuoTrap sensor is an ANT+ compatible 2.4GHz wireless sensor that fits directly into the chainstay of certain Trek bicycles for a clean look that preserves aerodynamics and installs in seconds providing both speed and cadence signals.Features

• ANT+ 2.4 GHz digital combo speed and cadence sensor
• For use with Bontrager Node and select Trek ACH digital wireless computers
• For use with many other ANT+ enabled devices on the market
• For use with Trek frames featuring DuoTrap technology
• Includes 10mmm Crank Cadence Band Magnet