Bryton smart magnetless bike speed sensorthe smart magnetless bike speed sensor from bryton is an accurate and reliable speed sensor for indoor and outdoor use. Plus, it uses no magnets and is very easy to install and setup. The bryton smart speed sensor applies both ant and bluetooth technology. It wirelessly transmits your speed data to cycling computers and smart phones. With no magnets and exposed parts to line up, it is much easier to install. Dual supportfeaturing the application of dual technology, ant and bluetooth, smart cadence sensor is able to connect to both cycling computers and smart phones. It is compatible with most devices in the market. Improve yourselfdesigned to help you monitor your outdoor and indoor training. Combine it and improve your personal best or compete with other cyclists. Features wireless technology bluetooth 4.0 ant no magnets, easy to setup, clean look bluetooth and ant compatible easy to install for indoor and outdoor training compatible with most devices on the marketbuy bryton accessories from chain reaction cycles, the world's largest online bike store.