Colour: Black Material: ABS Use battery type: CR2032 button battery Life time: about 180 hours Features: sensor, wireless interface, display speed Transmission protocol:Bluetooth-compatible 4.0/ ANT Waterproof rating: ip66 Product accessories: 1*cadence sensor Product size: 8.85x29.8x38.3mm Product weight:9g Specifications: 1. Waterproof IPX66: High waterproof level, supports riding in the rain, can be exposed to rain and soaked in shallow water for a short time. 2. Peripheral connection protocol: ANT Bluetooth-compatible dual mode, supports a variety of peripheral accessories. 3. Easy to install: The product accessories are complete and easy to install, and can be operated by themselves, which is convenient and convenient. 4. Easy to use: The information is transmitted from the sensor to the computer unit wirelessly, which is more convenient to use and has a longer service life. 5. Super battery life: CR2032 button battery, large battery capacity, super battery life about 180 hours. Package Included: 1*Cadence sensor