Feature: Equipped with clear bright LCD, clear image and different color indicate the trajectory of the file clearly. Based on advanced multiple frequency network impedance measurement technology and automatic calibrating ensures the measurements are accurate. Autoclavable file clip, file hook, file probe. Avoiding cross infection effectively. When doing the measurement, the changes of the sound can indicate the position of the file in the root-canal. Technical Details: Power: 3.7V/2000mAh Power consumption: ?0.5W Screen: 4.5?LCD Main unit weight: 446g Dimensions: 131mm 75mm 105mm