XOSS Vortex Bike Cadence and Speed Sensor - YouTube
XOSS G+ GPS Bike Computer with Smart Cadence Sensor,ANT+ Bluetooth Cycling Computer, Wireless Bicycle Speedometer Odometer, Waterproof MTB Tracker Fits All Bikes - Yahoo Shopping
XOSS X1 Suite Speed/Cadence Sensor for Cycling, ANT+/Bluetooth 4.0 Wireless Bicycle RPM Speedometer and Cadence Sensor for Road/Spinning/Stationary Bike/MTB Compatible with Wahoo/Garmin/Zwift/Strava
Amazon.com : XOSS X1 Bike Speed and Cadence Sensor Speedometer Bicycle ANT+ Bluetooth 4.0 Wireless Cycle Computer (2 Pack) : Sports & Outdoors