Check the listing for details. ROCKBROS Bicycle Computer M1 GPS ANT Bluetooth Wireless Rainproof Cadence Sensor. Condition: New. Listed at 38.99 USD. Product information 1.Product Name:M1 Smart GPS Cycling Speedometer 2.Screen Size:2.9inch LCD 3.Product Weight:83g (excluding protective case) 4.Battery Capacity:1200mAh3.7V 5.Product size:90*53*20mm 6.Memory capacity:150h/16M 7.Battery life:About 30-35h 8.Charging:Type-C 9.Charging time:About 3.5h 10.App connectivity:Bluetooth5.0 Product features Supports Satellite System Displays Cycling Data Supports App syncing Smart Cycling speedometer Four-star Positioning System for Fast and Accurate Positioning GPS Glonass Galileo Beidou Quick positioning in 30 seconds 25 Cycling Data Metrics for Customizable Display Includes 5 Pages of Data, with up to 7 metrics displayed per page Long Battery Life of 35 hours with 1200mAh capacity Type-C Quick Charging Interface, only 3 hours for full charge High-definition Display for Clearer Data 2.9-inch HD LCD screen for easy-to-read data Wide Compatibility, supports multiple peripherals Supports connection to heart rate monitor, speed/cadence sensor, and power meter with ANT+ protocol simultaneously Backlight Support to prevent glare Clear visibility of screen information during day and night, automatic backlight from 18:00 to 9:00 after setting time zone IPX6 Waterproof, resistant to heavy rain and harsh weather IPX6 waterproof rating, allowing worry-free riding in adverse weather conditions Avoid prolonged exposure to heavy rain or immersion in water Includes silicone protective case for anti-slip and durability Silicone material protective case for anti-slip and durability Sync Data with App, have full control of your cycling data Turn on the Bluetooth on your phone and connect to the "Cyclist" app through Bluetooth Bike Computer Settings Steps Set data according to your needs Installation Steps 1.Quick and convenient installation 2.Align the Speedometer mount with the rubber pad 3.Place the mount above the handlebar stem 4.Secure it with two crossed rubber rings 5.Fix the mount securely 6.Rotate and fix the Speedometer onto the mount 7.Installation complete Packaging Display