Features: 1) A simple, convenient, and inexpensive way to turn your PC laptop into a personal navigator 2) GPS sensor bundled with nRoute and City Select navigation software that automatically guides you with turn-by-turn directions and voice prompts 3) 12-parallel-channel, WAAS-enabled sensor/receiver just 2.4 in diameter with an integrated magnetic base 4) Connects to your PC via USB interface (USB 1.1 compatible) 5) Unit software: YK 18 USB Driver Specifications: 1) Model: GPS 20 2) Color: black 3) Compatibility: PC, notebook, PDA 4) Interface: compatible with USB 1.1 full speed hosts 5) WAAS-enabled: yes 6) Channels: 12 parallel-channel GPS receiver 7) Receiver sensitivity: -165dBW minimum 8) Acquisition times: a) Reacquisition: less than 2 seconds b) Warm: approx. 15 seconds (all data known) c) Cold: approx. 45 seconds (initial position, time, and almanac known; ephemeris unknown) d) Auto locate: 5 minutes (almanac known; initial position and time unknown) e) Sky search: 5 minutes (no data known) 9) Accuracy: a) GPS Standard Positioning Service (SPS) i) Position: less than 15 meters, 95 percent typical ii) Velocity: 0.1 knot RMS steady state a) WAAS i) Position: less than 3 meters, 95 percent typical ii) Velocity: 0.1 knot RMS steady state iii) PPS Time: +/-1 microsecond at rising edge of PPS pulse iv) Dynamics: 999 knots velocity (only limited at altitude greater than 60,000 feet), 6g dynamics 10) Update rate: 1 record per second 11) Magnetic base: integrated with the antenna 12) Cable length: 6.56 feet (2 meters) 13) Power source: powered through the computer\'\'s USB port 14) Item width: 2.4 inches 15) Item height: 0.77 inches 16) Item depth: 2.4 inches 17) Item weight: 0.22 pounds 18) Warranty: 1 year parts and labor