Metal Detector Pen, MASTECH MS8902B Non-contact 20V-600V AC Voltage & Metal Detector Tester Meter Professional AC Voltage & Metal Detector.Non-contact test.Designed for measure AC voltage & Metal. Voltage sensitivity is from 20V to 600V AC.Metal detecting distance is less than 15mm. The sensitivity of AC voltage adjustive.Sound and light instructions.Auto power off. It is designed according to EN61010-1/600V CAT concerning safety requirements. Safe, professional and easy-to-use.Small and compact pen, design for easy carrying.