From the Owner's Manual:  "Stratus is a portable, battery-operated receiver that works in conjunction with the ForeFlight Mobile app.  It provides pilots with free in-flight weather and traffic and is a source of accurate GPS WAAS position.  Stratus receives...ADS-B weather information (FIS-B), traffic information (TIS-B), and other related data and broadcasts it to ForeFlight Mobile via a WiFi network.  Stratus is also an...AHRS system.  You can view your aircraft's course, ground speed, vertical speed, turn rate, attitude, and altitude from you iOS device with the free Stratus Horizon app."

This particular unit has been lightly used and comes with a protective case and suction cup window mount for better ADS-B tower reception.  The unit functions perfectly.  I have recently upgraded the avionics in my aircraft and I am selling this Stratus unit because it is no longer needed.