Thank you for viewing! This is an Apex Locator, which allows for accurate measurement of the root canal apex position in dental clinical practice and root canal treatment. It is a highly reliable device with a proven track record. The included file hook accessory makes it easy to attach to needles (files). ■ Condition ・Brand new, unused ・Taken out of the package once for photography, but the protective film is still on the LCD screen. ■ Specifications Power supply voltage: DC 7.5V (using alkaline batteries - not included) Power consumption: 0.04W or less Test voltage: 80mV AC or less Test current: 10µA or less LCD display: Color LCD display + piezo buzzer Body dimensions: 105 x 105 x 115 mm Weight: Approximately 370 g ■ Features ・Accurately measures root canal length using electrical resistance measurement ・Color LCD and audio notification improve measurement accuracy and operability