The LX version of the Stealth has 3 additional features: Data, Autofocus, Tape Search. A stylish, lightweight body houses our improved, second-generation proprietary electronics. The pressure-sensitive 'throttle' control allows you to ease into zooms in either direction, hold a steady speed, or instantly accelerate into a 'crash' zoom. The Stealth is completely intuitive and smooth, requiring no setup, power, or operator skill. This unique miniature control offers unmatched convenience, value, and performance.