Hand held detector, easy operation, with sound/vibration alarming, ... LED display Ergonomic grip fits comfortably in every hand Choice of clear audible or silent vibrate/LED ... Safety Levels with Respect to I turnan Exposure in Radio Frequency Electromagnetic Fields, 3 kHz to 300 CHz ... of Law EnLorcernent arid Criminal Justice; Standards for Hand-Held Metal Detectors for use in Weapons Detection, NILECJ- ...