The Model 41122 is a compact, continuous workstation monitor that provides real-time monitoring of an ESD workstation, including wrist-strap, mat and cords. Red and green LEDs on the unit's front panel indicate grounding status.The monitor can be used with any brand of industry-standard, single-wire wrist-straps. It is a true 100% continuous monitoring device and thus cannot be fooled, it's claimed. There are no false alarms and no pulsed current that can cause skin irritation. The unit can be used by personnel ranging from 5' tall and 90 lb. to 6'5" tall and 250 lb.