The Transforming Technologies CM1600 RangerPro Resistance Monitor uses a continuous pulse of an ultra-low voltage signal that measures the electrical resistance of two wrist bands, two work surfaces, and two auxiliary grounds simultaneously. This monitor uses special dual wire wrist band sets that contain two independent elements, which provide fail-safe protection. It’s extremely sensitive and reliable ground monitoring instrument with audible and visible alarms are triggered if the operator's resistance exceeds 35 meg ohms (factory default). The Transforming Technologies CM1600 RangerPro Resistance Monitor allows for low resistance to trigger an alarm event or uses preset limits. Mat alarms are set at 100 megohm. This unit save times by eliminating the time consuming testing of grounding products and are packaged in a stainless steel case with remote jacks. The RangerPro Monitor meets or exceeds the requirements of ANSI ESD-S20.20 and ESDA Standard 1.1-2006. The CM1600 is comparable to 3M Model 724 Workstation Monitor.