Features: 1. Small size, light weight, and wireless waterproof design make bicycle odometer more convenient and durable. 2. Ordinary bicycles such as road bicycles, mountain bicycles, and folding bicycles are compatible with this bicycle odometer. 3. Large LCD display allows you to easily read statistics from bicycle odometer. 4. A multi-purpose meter can measure speed, time, mileage, heart rate, and cadence. Sea waves, slopes, etc., escort your journey. 5. Support four-star positioning, Beidou, GPS, GLONASS, positioning more quickly and accurately. Description: This product is a multi-purpose meter can measure speed, time, mileage, heart rate, and cadence. Sea waves, slopes, etc., escort your journey. Specifications: Screen Size: 1.8 inch Battery Type: Rechargeable Lithium Battery Battery Life: 25Hours IP Rating: IPX7 Screen Type: LCD Display Positioning: GPS/BeiDou/Glonass Package Included: 1 * Bicycle odometer"