Progressive Electronics Model 620K Security/Alarm Kit

The 620 Loop Verifier is designed specifically for security/alarm techs. It operates as a continuity tester on N.O. and N.C. circuits, giving an audible tone when it detects an alarm condition. It latches a change for identifying "swingers" and operation of remote switches. It also injects tone into via clips or RJ-11 plug and has magnetic back plate for mounting to cabinet doors. Kit includes 620, 200EP probe and polyester belt holster. Operates on 9V battery (sold separately).