Bryton smart dual sensorthe smart dual sensor from bryton is a smart speed and cadence sensor that's easy to install and setup, requires no magnets and is compatible with bluetooth, ant and most devices on the market.the bryton smart speed and cadence sensors applies both ant and bluetooth technology. They wirelessly transmit your 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 the smart speed and smart cadence sensors are able to connect to both cycling computers and smart phones. Improve yourselfdesigned to help you monitor your outdoor and indoor training. Combine it and improve your personal best or compete with other cyclists. Features bluetooth 4.0 ant dual sensor smart sensor for speed and cadence no magnets needed easy to install ideal for outdoor and indoor trainingbuy bryton accessories from chain reaction cycles, the world's largest online bike store.