Mode Setting: Each sensor can only select one mode (speed or cadence) at a time. You'll need two sensors to test both speed and cadence (one for speed, one for cadence). Battery Usage: Remove the insulation disc from the pre-installed battery before use. Reinsert the battery to switch between speed and cadence modes. Bluetooth Device: When using Bluetooth, one sensor can only connect to one app or device simultaneously. With ANT+, it can connect to multiple devices at once. Connection Settings: When using a smartphone app, search for the sensor within the app. Searching via your phone's Bluetooth settings will not work. Sleep Mode: The S3+ sensor automatically enters sleep mode after 1 minute of inactivity to conserve power. It will only start broadcasting after being properly woken up. Material: ABS Battery Model: CR2032x1 Wireless Interface: Bluetooth 4.0, ANT+ Waterproof Level: IP66 Includes: 1* Sensor