Digital multimeter 5 1/2 with fast reading rate (200 to 500 in 4 1/2digits) 50 ppm basic accuracy plus AC RMS and Ohms. Apparently without interest but incorporating filters and fitted with rare option 010 (multiple maths and statitics functions). It is the only instrument able to verify the noise between 0.1 and 10 Hz of the various DC calibrators (Fluke 5440X, 5700, 5720, Datron/Wavetek 47XX and 48XX, Valhalla 2720GS...). Settings are described in the verification section of the 5700 manual. Even the HP 3458A under remote control and software cannot do ! An essential tool for every body involved in calibration. Tested OK. Rear feet missing. 290 euros plus shipping