Compex Multi-Frequency Apex Locator – Battery Operated. Proprietary Algorithm based on multi-frequency dependent impedance method helps locate foramen and determine working length during treatment. Features easy-to-read color graphic display and small footprint to fit on counter or treatment tray. 1 charge of battery allows 3 hrs of use. Includes main unit, measuring cable, testers, 2x lip hooks & clips, touch probe, 1x rechargeable battery (3.6V/750mAh), AC adapter, IFU and user guide.