Automatic vacuum pump for saving leftover wine. Position unit over the bottle top and push down. The trigger switch will be activated. Air will be extracted automatically. When extraction is completed LCD will show “OK”. Then press the top bottom labeled “TEMP”. It will display wine temperature in F° or C°. The lower button, “STORAGE TIME” indicates how many days and hours the wine has been stored. Pull unit straight up off bottle to remove. For storage, a bottom lid inserts into the base.