Adafruit Ultimate GPS Logger Shield - Includes GPS Module

This GPS shield works great with either UNO or Leonardo Arduinos and is designed to log data to an SD card. Or you can leave the SD card out and use the GPS for a geocaching project, or maybe a music player that changes tunes depending on where you are in the city.

-165 dBm sensitivity, 10 Hz updates, 66 channels
Low power module - only 20mA current draw, half of most GPS's
Assembled & tested shield for Arduino Uno/Duemilanove/Diecimila/Leonardo (not for use with Mega/ADK/Due)
MicroSD card slot for datalogging onto a removable card
RTC battery included, for up to 7 years backup
Built-in datalogging to flash
PPS output on fix
>25Km altitude
Internal patch antenna + u.FL connector for external active antenna
Power, Pin #13 and Fix status LED
Big prototyping area