Description features: 1. Small size, light weight, wireless waterproof design makes the bicycle odometer more convenient and durable. 2. Common bicycles such as road bikes, mountain bikes, folding bikes, etc. are compatible with this bicycle odometer. 3. The large LCD display allows you to easily read your bike odometer statistics. 4. Multi-function meter can measure speed, time, mileage, heart rate and cadence. Waves, slopes, etc. will protect you on your journey. 5. Supports four-star positioning, Beidou, GPS, and GLONASS, making positioning faster and more accurate. Product description: This product is a multi-functional instrument that can measure speed, time, mileage, heart rate, and cadence. Waves, slopes, etc. will protect you on your journey. Specifications: Screen size: 1.8 inches Battery type: Rechargeable lithium battery Battery life: 25 hours IP rating: IPX7 Screen type: LCD Positioning: GPS /BeiDou/Glonass Package includes: 1*Bike odometer