The Bounty Hunter ® Guardian ® Security Metal Detector detects all types of metals. This security wand provides momentary, low detection that minimizes interference from environmental metal objects. The interference elimination feature minimizes electromagnetic interference from other devices. The Guardian ® operates on a 9-volt battery and features a comfortable grip and wrist strap. FEATURES: Detects all types of metals Momentary, low operation minimizes interference from environmental metal objects Interference elimination minimizes electromagnetic interference from other devices High pitch audio alert sound, silent vibration alert, red LED target indicator Comfortable grip and wrist strap Quick change battery compartment Runs on a 9-volt battery (not included) Low battery LED indicator