EM Aware Monitor Number of Wrist Straps Monitored 2 Number of Dissipative Surfaces Monitored 1 Number of Metal Grounds Monitored 0 Upper Resistance Limit 6.5 to 7.0 M Lower Resistance Limit 750 kilohm Alarm Buzzer Power Required 100 to 240V AC Features ESD Event Continuous Monitor Includes Standard Antenna