The PGPFPD5 is a GPS speedometer that"s the perfect accessory for your bicycle. Use it for races or casual rides, and you"ll always be in the know about your current, average, and maximum speeds, plus your compass direction. This device is also equipped with an odometer to measure you total miles, an altimeter to display your altitude, and a chronograph. The GPS automatically logs up to 351 hours of data, which can later be explored and analyzed using the included USB cable and PC data. The GPS can also guide you to a destination or a pre-selected home destination. EL backlight makes this device usable in low light conditions or at night.