Tracking your fitness has been made easy, get everything you need to accurately measure your cycling metrics with the Sunny Health & Fitness Exercise Cycling 2-in-1 Cadence Speed Sensor - CB110. Installation is easy so you can stay focused on your exercise. This sensor is Bluetooth and ANT enabled which allows you to connect seamlessly with any mobile device. Use this to track your Cadence / RPM as well as your speed during indoor cycling or on the road while exercising outdoor! Two LED lights indicate the sensor's device connection: blue light signifies cadence mode and red light represents speed mode; please refer to the user manual for more details on the lights. Sync with the Sunny Health & Fitness SunnyFit® app for the best cycling experience.