Includes:

GPS with Compass module
Protective case
Four-position cable (compass)
Five-position-to-six-position cable (GPS) for APM or PX4
Pixhawk users will find a six-position cable included with the Pixhawk kit to connect the GPS with Compass module to Pixhawk. If you need a second cable to connect the GPS with Compass to Pixhawk, please add the six-position cable here to your order.

Options: Add a GPS mast to improve the performance of the GPS with compass module. Documentation and User Guides

Features and Specifications:

ublox LEA-6H module
5 Hz update rate
25 x 25 x 4 mm ceramic patch antenna
LNA and SAW filter
Rechargeable 3V lithium backup battery
Low noise 3.3V regulator
I2C EEPROM for configuration storage
Power and fix indicator LEDs
Protective case
APM compatible 6-pin DF13 connector
Exposed RX, TX, 5V and GND pad
38 x 38 x 8.5 mm total size, 16.8 grams.