ALLOSUN Sun Security Wand TS95N Handheld Metal Detector, Blue It's an ideal tool for using at airports, industrial sites, government buildings, schools, hospitals, conferences, nightclubs, Sport Events, or in other places where security is needed. Adjustable Sensitivity level: low Sensitivity switch, easily switch the Sensitivity, realizing the detection of bulky goods and very Small metal objects Two ways to alarm: you can Choose either an audible tone or vibration. Equipped with earphone, you can do the metal detection silently. Power supplied by 1 piece 9V battery, 6F22 or equivalent. (Not Provided by Seller)