Features: With compass and scale, especially for APM2.6 NEO-7M Ublox/u-blox GPS module for APM These are pre-configured, flashed with the correct settings, and tested for plug-and-play functionality. This is not normally done in other stores. Super bright LED BlackPlane with standard Mk mounting holes 45mm X 45mm Output GGA, GSA, and RMC frames 1Hz (default) changed to 5Hz Permanent configuration retention Cable included + Moved LED to the top + Larger battery + Onboard compass + 6-pin connector for easy connection to MEGA BLACK + 4-pin connector for GPS use only + 4-pin connector for compass use only + GPS \"PCB HOOD\" for more EMI/RFI shielding Can use both 4-pin connectors simultaneously The GPS unit is pre-configured for multiwii. Unlike other stores that ship it with default settings, leaving you to figure it out yourself. Pre-tested = PLUG AND PLAY for MWC 2.1 MultiWii GPS-assisted position hold and RTH functions NEO-7M Ublox u-blox GPS module with built-in compass HMC5883l (compass) (mag): - Main chip: U-BLOX NEO-7M - C/A code, 1.023 MHz - Receiver frequency: L1 [1575.42 MHz] - Localization performance - 2D: 3m (average) - 2D: 2m (average), with WAAS - drift