Feature: Need not to make adjustment automatically, high precise It is not necessary to make any adjustment according to different patients. Two kinds of different frequency signal, Irrespective of dry or bleeding purulence in the root canal. Precise measurement results, although its filled with NaCLO2, Physiological Saline, H2O2, Water, etc. Irrespective of kinds of teeth, size of root tip, thickness of root canal file. LCD display with exact visualization. Set Shining position of root tip arbitrarily, to as length sign during operation. Dapper root file holder Root canal holder, contrary electrode can be sterilized by autoclave. Contact point of root canal file is made by high quality metal Technical Data: Power voltage:DC7.5V(5*DC 1.5V AA Alkali dry cells) Power consumption: below 0.135VA Test Voltage:below AC80mV Test electric current: below 10uA Display: LCD Dimensions: 105*105*115mm Weigh: 370g Packing list: Main unit 1pc Probe cord 1pc File holders 3pc Contrary electrodes 5pc