Clamp On Earth Resistance Tester, Bluetooth Compatible Yes, Calibration Certificate Available Separately, Dustproof Yes, Jaw Capacity 1.5 in (39mm), Leakage Current Range 0.5 mA to 35 A, Number of Records Stored 256, Resistance Accuracy High Range +/-35 Percent, Low Range +/- 1.5 Percent, Communication Protocol Bluetooth, Includes 4-AA Batteries, Calibration Check, Carrying Case, Carrying Wrist Strap, User Guide CD-ROM. This item has been restricted from sale in the following state (s): []