With the Topeak PanoBike Blue Tooth Speed/Cadence Sensor, you can turn a smartphone, tablet, or any Bluetooth Smart (BLE 4. 0) device into a personal training and health management device. All you have to do is chose an app (Strava, MapMyRide, Runtastic, Endomondo, ext.) of your liking and sync it with the Blue Tooth Speed/Cadence Sensor. The Bluetooth smart algorithm extends the included CR2032 battery's life to an incredible 1800 hours (approximately five years with an hour a day use). The transmitter is water resistant so light precipitation will not ruin the device. And, it has a transmission range of 33 feet so you can use laptops/desktops/tablets when training indoors, or a handlebar/pocket location while on the bike. The Topeak PanoBike Blue Tooth Speed/Cadence Sensor uses a rubber-band style mount with zip ties to allow quick and easy mounting on chainstays or seatstays without harming the frame.