Per the manufacturer:

"The 2S receiver manufactured by Stratus by Appareo is a pocket-sized, WAAS enabled, wireless, ADS-B “In” unit.  The 2S delivers subscription-free weather, NEXRAD radar, METARs, TAFs, TFRs, AIRMETs, SIGMETs, and NOTAMs.  This unit provides the ability to record your flight with GPS position, altitude speed and attitude.  It also offers a stunning display with luminous terrain, night sky view, and a brilliant obstacle awareness system, ForeFlight with Synthetic Vision.  Additionally, the 2S provides a dual-band (978 MHz and 1090 MHz) receiver that can display traffic information right on the ForeFlight Maps page.

The Stratus 2S can be coupled with the Stratus ESG to provide both an ADS-B “In” and ADS-B “Out” function."

This unit was one of four used by our flying club. Comes with a suction cup mount (like in the photo), charger and owner's manual.