Working condition. 30 days warranty. Tested or calibrated, details are mentioned in each listing. The picture of the attached Certificate is the last performed calibration for the unit you are purchasing. If we do not show a certificate, the unit is just tested but not calibrated (No certificate/cal-data will be provided). Calibrated units are performing according to specification. Non-calibrated units are operational/power up tested. No accessories (No power cord, no cables, no probes, no connector) included unless stated differently in the ‘accessories’ section of listing description.