Adding GPS to your Arduino has never been easier. This kit comes complete with everything you'll need, including an EM406 GPS receiver and corresponding headers.With the example sketch, you will be able to locate your exact position within a few meters. GPS also gives you amazingly accurate time! The DLINE/UART switch switches the GPS module's input/output between Arduino's standard TX/RX pins or any digital pins on the Arduino (default setting uses pins 3 and 2 connected to TX and RX, respectively). The regular GPS pins (RX, TX, PPS, etc.) are broken out to a 10-pin 0.1" pitch header, and a small protoyping area is also provided. An ON/OFF switch is included which controls power to the GPS module. Additionally, the Arduino reset switch is also brought out.Note: The DLINE/UART switch must be set to DLINE in order to upload code through the Arduino IDE.Kit Includes:1 x GPS Shield1 x EM-406A SiRF III GPS Receiver2 x Stackable Headers 6-pin2 x Stackable Headers 8-pin