Optimum sensitivity Self-calibrating Elongated profile Easy and convenient to use with one-touch button and three-color LED lights Clear audible or Silent / Vibrate LED alarm signal Rugged injection molded construction Ergonomically designed grip Easy ON/OFF battery cover: standard 9V battery included Power switch and LEDs positioned for easy access and high visibility The SuperWand's 360-degree detection field provides uniform sensitivity and tip pinpointing to detect weapons and other metal objects with extreme accuracy. From U.S. airports to sporting events, the lightweight SuperWand is the hand-held of choice for today's security screener.