The Wahoo RPM Cadence Sensor BT/ANT+ is wireless, magnet-less, lightweight, and easily mounts to your bike's crank arm or to your shoe. Bluetooth Smart and ANT+ dual band technology allows you to connect to and display data on both smartphones and GPS bike computers. Collecting cadence data has never been this easy. Wahoo RPM Cadence Sensor BT/ANT+ Features Dual band technology Wireless connection Sleek, lightweight design Cadence measurement Two bike mount options Shoe mount option Visible connection Replaceable battery Universal fit Wahoo RPM Cadence Sensor BT/ANT+ Specifications Physical Dimensions (LxWxH): 1.25 x.75 x 1 Weight: 7 grams Battery: CR2032 Battery Life: Up to 12 months Water Rating: IPX7 (waterproof up to 5 ft) Wireless Signal Strength Up to 10 feet In the box RPM Cadence sensor CR 2032 Battery (installed) Rubber Mounting Option Zip Ties Shoe Mount Option 3M double sided tape Quick Start Guide Important Product Info Guide