This is the Pixhawk flight controller but not as you know it! All the features (plus extras!) of the original Pixhawk but all now packed into a tiny 35x35mm package! This flight controller is therefore compatible with the latest version of Arducopter and supports all of the same GPS, OSD and power modules (although the connectors are slightly different).
One of the great features of the PixRacer is that it has the option to have WiFi built-in via a ESP8266 Wifi module that plugs onto the board (ESP8266 module sold separately). This means you can flash new firmware, setup your system and enable in-flight telemetry without the need for a desktop system.
Note: The PixRacer is designed to use a separate avionics power supply. This is necessary to avoid current surges from motors or ESCs to flow back to the flight controller and disturb its delicate sensors. We therefore recommend that you sue the high voltage power module with this product.