Apex locator with an accuracy rate of 97.71%. Multifrequency apical positioning technology is capable of acurate measurement even in the presense of blood or residual pulp in the root canal. Automatic calibration ensures accuracy. Clear, bright LCD display. Clear sound with intermittent beeping at different frequency depending on the position of the apex. Adjustable sound level. Apical stop setting - stop alarm function position can be adjusted freely.