CYCPLUS C3 speed and cadence sensors, two pieces. Brand new, unused. You can switch between speed and cadence using the switch on the back of the unit. Compatible with both Bluetooth and ANT+, so it can be used with CYCPLUS and other cycle computers from various companies, such as Garmin. A combination of a cycle computer with map display and excellent apps like Garmin, and sensors like this CYCPLUS C3 product is economical and a good choice. Thank you for looking.