Garmin GPS 18 USB Deluxe Portable Navigator. Form factor: Fixed, Acquisition times - cold: 45 s, Acquisition times - warm: 15 s. Operating temperature range (T-T): -30 - 80 °C, Storage temperature range (T-T): -40 - 90 °C. Interface: USB 2.0, Dynamics: 999knot, AC adapter input voltage: 4.4 - 5.5 V