M1 Bike Odometer:The 2.9-inch non-glare backlit screen introduces FSTN technology and is highly visible in sunlight. The LCD screen automatically lights up according to the sunrise and sunset times in different time zones. You can read data more easily and clearly during the day or night. High-quality tempered glass, don't worry about your fingernails scratching the screen. (Note: Be sure to set the time zone first when using it for the first time. Then all functions can function normally.)Dynamic GPS positioning, higher sensitivity, higher accuracy, faster positioning. The navigation chip is imported from Switzerland. GPS signals track your route. Once connected to your phone using Bluetooth, your journey will sync with the app, so you can see exactly what route you're using for your ride.ANT+ syncs sensors and apps to simultaneously record speed, , heart rate, power, route traveled, altitude, and more. Strava accounts can be added through our app to sync data on the ride computer. Help you monitor your workout data and provide you with a scientific training experience. (Search "" in Google Play Store or App Store to download the app)IPX6 wireless waterproof design. Cable clutter on handlebars is over. Can be used at any time during rainy days. 1100mAH large capacity, sustainable working time more than 30 hours.C3 Wireless Bike Speed Sensor:Bluetooth and ANT+ Multi-Protocol: Supports all devices and apps that collect speed or data via Bluetooth or ANT+.Ultra-Small Design, Durable: It measures only 38mm x 29.5mm x 9.5mm and weighs only 9.2g. It does not affect the appearance of the bicycle and increases the burden of the bicycle. 300 hours of use time, 300 days of standby time. When not exercising, it goes into sleep modeDual Mode Sensor: Quickly switch between tempo and speed sensor modes by switching to different positions.Easy to install, no magnets or calibration required. Superior quality and innovative design help you ride scientifically. These sensors can be mounted on any bicycle hub and are easy to install, maintain and move between bikes.Colour: BlackMaterial: PlasticPackage Contents:1 * Bicycle computer1 * Dual mode sensorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.