Features： 1、ANT+ protocol compatible with for GARMIN sports watch/stopwatch/Bryton/IGPSPORT/ZWIFT/ONELAP/BKOOL/TACX and other virtual cycling training software. 2、Bluetooth protocol compatible with for Songtuo Bluetooth sports watch/Walker/Qij/Blackbird Ride/Tulip Sports/STRAVA 3、Cadence sensor mode, reinstall the battery, the red light is on to indicate the cadence mode. At this time, it can be searched as a cadence sensor by Bluetooth or ANT+ devices. It is installed on the inner side of the left crank. 4、Speed ​​sensor mode, reinstall the battery, the green light is on to indicate the speed mode. At this time, it can be searched as a speed sensor by Bluetooth or ANT+ devices. Install the sensor on the front wheel hub. 5、It is a two‑mode cadence sensor that can track and capture speed data on the bicycle. Specification： Item Type: Bike Speed and Cadence Sensor Material: ABS Color: Black Battery: 2032 Group Button Cell 220mAh CR2032(Included) Cruising Ability: 600h(Cadence)/400h(Speed) Standby Time: 300h Protection Level: IP67 Compatible Bluetooth Protocol: for Garmin/Wahoo/Zwift/Tacx/Bryton/Walker/Blackbird Protocol Standard: Support ANT+ and Bluetooth dual protocol and apps Indicator Status/Equipment Status: Green Light Flicker/Cadence Mode Blue Light Flicker/Speed Mode Red Light Flicker/Battery is lower than 20% Weight: Approx. 27g/1oz Package List： 1 x Sensor 2 x Rubber Band 1 x Flat Rubber Pad 1 x Instruction