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The Bontrager DuoTrap Digital Speed Sensor wirelessly transmits ANT+ and Bluetooth signals to your computer or phone. The sensor installs easily and fits directly into select Trek bike chainstays for a great aerodynamics and sleek look.
DuoTrip 300 and smartphones can both be used together via ANT+ and Bluetooth. It can be used for all ANT+ and Bluetooth Smart wireless-enabled devices. This computer includes a CR2032 battery, an adjustable cadence band, and a Bontrager wheel magnetic.
Everything you need to know about using the bike computer, charging, and other details. Click here.