Features: Apex locator Joypex5-1A is a highly precise instrument with the latest technology used for measuring the working length of root canal of teeth. a. The measurement is free from the root canal environment. Therefore, whether the root canal is dry, or filled with electrolyte, blood or physiological brine will not affect the measuring result. b. The LCD screen visually displays the moving trace of file in the root canal. c. There is beep alarm to indicate the apex when the display number on the LCD is below 2mm d. The power of the unit is supplied with 5 pieces of AAA dry Li-on battery. e. File holder & hooks can be autoclavable!" SPECIFICATIONS: 1. Input voltage: DC7.5V 2. Power: < 0.08w 3. Current: <10μA 4. battery-operated, 5 pieces of AAA dry Li-on battery