CYCPLUS GPS Bike Computer Wireless Stopwatch IPX6 Waterproof Cycling Odometer Bicycle Accessories Speedometer Specifications: Screen size: 2.0 inch LED Product Size: 55*55*22mm Product weight: 52g Battery: 600mAh Charging Mode: Micro USB Battery life: 20 hours Charging Time: 2 hours Waterproof: IPX6 Features: 1.?Dynamic GPS Positioning?- This bike computer with higher sensitivity, higher accuracy, faster positioning. The GPS signal tracks your route, it will display ride time, riding distance, total riding time, total riding mileage, clock, current altitude. 2. ?2' inch LCD anti-glare large screen?The glare-free backlit screen introduces FSTN technology, which is highly visible in sunlight. You can read your data more easily and clearly no matter day or night. High-quality tempered glass, do not worry about nails scratches the screen. 3. ?IPX6 Waterproof and Large Battery Capacity?- Wireless and waterproof design. It can work anytime in the rain. 600mAH super large capacity, the sustained working time is more than 10 hours. 4. ?Automatic Wireless Bike Computer?This cycling computer will automatically enter sleep mode after 10 minutes of inactivity, it will display your last cycling data when you turn it on.