■test voltage dc 5000v/2500v/1000v/500v/250v ■insulation resistance up to 1tω ■short circuit current up to 4ma ■dielectric absorption ratio(dar) ■polarisation index(pi) ■auto discharge function ■data hold(auto) ■auto power save: power save about 10 miunutes after the last operation ■cat iv.600v ■ip54