Megohmmeter Backlit Digital Display No Bluetooth Compatible No CAT Safety Rating CAT I Calibration Certificate None Capacitance Auto Discharge No Display Type Digital Dustproof Yes Greater Than 30V Warning Yes Includes Soft Carrying Case Insulation Limit Alarm No Maximum Insulation Resistance 1 gigohm Minimum Insulation Resistance 20 megaohm PI/DAR Testing No Parameters Measured Insulation Resistance Pass/Fail Selection Limits Yes Power Source Battery