Slendertone Fortex Upper Body Strength Trainer Air-based strength training system for toning and strengthening upper body muscles Built-in software assesses your strength and develops custom training program just for you Efficient design shows results after 4 exercises per day, 4 times per week, for 4 weeks straight Includes 4 workout modes: person trainer (strengthen or tone), circuit trainer, and freestyle Includes 9-volt battery and instruction manual; backed by 1-year warranty