Feature: 1. Bluetooth and ANT+ Multiprotocol: Cadence speed sensor supports connection to bicycle computers, bicycle applications, fitness devices, and smartwatches, collecting speed or cadence through Bluetooth or ANT+. 2. Dual Mode Sensor: Easily switch speed and cadence by switching to different positions. Activate the indicator light to inform you of the health of the battery when you wake up. Blue indicates it is configured as a speed sensor, green indicates a cadence sensor, and red indicates low battery. 3. Easy to Install: Easily connect to the bicycle crank and hub using the included elastic band and rubber base. Maintain and move between bicycles. Suitable for road bikes, and indoor trainers, compatible with various devices. 4. IP67 Waterproof: The cadence speed sensor has an IP67 waterproof rating, allowing you to ride freely without being hindered by the weather. (Do not immerse in water) 5. Long Term Continuity: When not exercising, the bicycle cadence speed sensor will enter sleep mode. It has 300 hours of usage time and 300 days of standby time. 6. Mini Size and Light Weight: The size of the cadence speed sensor is only 40 x 30 x 10mm. The weight is only 11g. It does not affect the appearance of the bicycle and increases its burden. Specification: Item Type: Cadence Speed Sensor for Cycling Material: Plastic, Rubber, Electronic Components Battery Type: CR2032 Button Battery (Shipped With Built In Battery) Battery Capacity: 220mAh Number Of Batteries: 1 Weight: Approx. 55g / 1.9oz Size: Approx. 40 x 30 x 10mm / 1.57 x 1.18 x 0.39in. Package List: 1 x Cadence Speed Sensor6 x Accessories1 x Manual