3 altimeters. Digital and analog variometer. Smart-filter technology. User customizable audio. 5 full-time data fields. Always-on realtime clock. Louder ausdio with 6 settings. Ambient temperature. Battery life over 250 hours (2 AA). Airspeed sensor ready. Superb ergonomics and styling. Very compact and light. 2 year warranty through Flytec. Included with vario are batteries. protective carry bag, and a manual. This model replaces the 4005 and 4010.