3M CTC333-WW, Ground Man Gorund MonitoringCondition:* Used, Sales Sample. In OEM Packaging. Additional Notes:* Ground Impendance Range: 1 …20 Ohms* Number of Monitored Grounds: 3* Grounds Enable: Yes, Each Individual Ground* Wrist Strap: Dual, 3.5mm Plug* Operators Resistance Alarm: Yes* Operator Body Voltage Alarm: Yes* Alarm Visual: LED* Alarm Audio: Buzzer* Output on Ground Failure: Logic Level, Any Ground Failure3M CTC333-WW