"Fluke 1664 part of the 1660 Series. The new Fluke 1660 series verify the safety of electrical installations in domestic, commercial and industrial applications. They ensure that fixed wiring is safe and correctly installed to meet the requirements of IEC 60364 and all relevant local standards. Fluke 1660 series are the only testers that help prevent damage to connected appliances. Fluke 1664 FC contains the Insulation-PreTestâ„¢ safety function (patent pending). This function prevents you from performing tests with appliances that are connected to the system during test, eliminating accidental damage. With the addition of Fluke Connect, you can now send test results directly to your smartphone. The results can then be transmitted to other members of the team. Data can also be saved to Fluke Cloudâ„¢ Storage, reducing the amount of paperwork and possible errors. It is a secure and accurate way to store test data and create test certificates with Fluke DMS (data management software).Insulation-PreTestâ„¢ safety function. Insulation at L-N, N-PE inputs. Automatic test sequence. Continuity at L-N, N-PE inputs. Fluke Connect® compatibility. ShareLiveâ„¢ Calling . FlukeCloudâ„¢ Storage . On\/Off switchable auto-start for RCD and looptest. Z max memory. Heavy duty, single input line cordLoop Impedance Test Type = Phase to Earth, Phase to NeutralAutomatic RCD Test = YesRCD Ramp Test = YesInsulation Test Voltage = 50 V, 100 V, 250 V, 500 V, 1000 VMaximum Voltage Measurement = 500V ac\/dcTest Type = Continuity, Frequency, Insulation Resistance, Loop and Line Resistance, Measure Motor Windings, Phase Sequence Test, Prospective Earth Fault Current, Prospective Short Circuit Current, RCD Test, Resistance, Voltage, Wiring PolarityEarth Resistance Measurement = YesDownloadable Data = YesInterface Type = BLE, USBContinuity Test Current = 10mA"