The new polar g1 gps sensor provides speedpace and distance measurement for outdoor sports for example running or cycling the g1 speed range is 0 199kmh 0 124 mph low battery indicator low power battery mode average 15 hours sirf iii chipset for excellent coverage shock resistant shows speed pace and distance waas support wide area augmentation system water resistant 20m speed range 0 199kmh 0 124mph battery type aa full power mode up to 30 hours with an optional lithium