Bryton Smart Dual Sensor:

Description

Bryton: 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.
Easy to Use
Smart Sensors are Magnet-less, and it is super easy to install, maintain and move between bikes.
Dual Support
Featuring 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. They are compatible with most devices in the market.
Improve Yourself
Designed to help you monitor your outdoor and indoor training. Combine it and improve your personal best or compete with other cyclists.
Specification
Wireless Technology: Bluetooth 4.0 & ANT+