Bryton 速度 踏頻 智能感應器 套裝ANT+ BLE ANT+Bluetooth 4. 0 Magnet less Cycling Speed Cadence sensor with dual ANT+ BLE technology. Easy installation and move between bikes. Designed for maximum compatibility of all wheel sizes. Designed to help you monitor your cycling performance, Self calibrating and wirelessly measure your speed while riding. Use both sensors to improve your personal best or see where you stand against the pros.