ANT+ 2.4 GHz and Bluetooth® Smart wireless digital speed and cadence sensor. ANT+ and Bluetooth® Smart allow simultaneous use of Trip 300 and smartphone. For use with all ANT+ and Bluetooth® Smart wireless technology enabled devices. Includes Bontrager wheel magnet, crank cadence band, and CR2032 battery. Visit thisisant.com for a complete list of compatible devices. Visit bluetooth.com for a complete list of compatible devices.