CYCPLUS Cadence Speed Dual Sensor Bike Accessories Cycling Bicycle Computer Speedometer for XOSS GarminFeatures - Size: 29.5mm*38mm*9.5mm - Weight: 9.2g - Battery: 220mAh CR2032 - Voltage: 3V - Function: Track cycling speed or cadence - Using time: 300 hours - Standby time: 300 days - Waterproof: IP67 - Link method: Bluetooth 4.0 ANT+ - Compatible: ANT+ sports watch like Garmin,TomTom..; ANT+ bike computer like Garmin WahooBryton Online game Zwift, Tacx, BKOOL. - Supported devices: Bicycle riding APP, Bicycle trainer software, Bicycle stopwatch etc. If buyers need to use the speed and cadence sensor together, just buy 2 pieces. The sensor is default as cadence sensor. For speed sensor, users need to switch the working mode as below photo. The green light indicates cadence sensor. The blue light indicates speed sensor. Bluetooth 4.0 and ANT+ It can connect to all kinds of APPs and equipments with ANT+ OR Bluetooth, such as Garmin, Wahoom, Bryton, Strava, Wahoo, Zwift etc.