This sensors has two modes: cadence mode and speed mode, after installing this sensor, you can conduct more scientific cycling training. IPX7 waterproof level make it can be used normally in rainy . If you are interested in this product, it will not let you down. Features: Dual Modes Switching: This sensors has two modes for you to switch: cadence mode and speed mode. If you want to get speed and cadence data at the same time, you need to buy two sensors. IPX7 Waterproof: IPX7 waterproof level make it can be used normally in rainy and not affected by bad weather. BT ANT+ Supporting: This sensors support BT and ANT+ dual protocol and compatible with most devices on the market. Built-in Battery: Built-in a CR2032 button battery to supplys power. APP Modes Switching: You can download the correct APP to switch the modes between cadence mode and speed mode. Easy to Install&Remove: It is easy to intal to your bicycle or remove it, no additional installation tools required. The riding speed can be measured without global position system speed can be measured without singals. Specifications: Material: ABS Waterproof level: IPX7 Battery: 1 * CR2032 battery (included) Communication distance: 10m Working temperature: -20℃~50℃ Storage temperature: -30℃~80℃ Wireless protocol: BLE CSCS ANT+BSC Item size: 40 * 30 * 10.7mm / 1.6 * 1.2 * 0.4in Package size: 150 * 100 * 50mm / 5.9 * 3.9 * 2.0in Package weight: 46g / 1.6ounce Packing list: 1 * Sensors 1 * User Manual 2 * Rubber Rings 2 * Rubber Gasket