Power supply: 4.5V, 3 pcs of AAA batteries Electrical safety class: Class II Applied part: B Operating conditions : Use: in enclosed spaces Ambient temperature: 5° C ~ 40 ° C Relative humidity: <80% Operating altitude < 2000m above sea level Atmospheric pressure: 70kPa ~ 106kP Transport and storage conditions : Ambient temperature: -20 ° C ~ +55 Relative humidity: 20% ~ 80 % Atmospheric pressure: 70kPa ~ 106kPa

• 1 x Main Unit
• 2 x File Clip
• 2 x Probe
• 1 x Measuring Wire
• 1 x Tester
• 2 x Lip Hook
• 1 x User Manual

Remove Battery Cover: Remove the battery cover from the device. Install Batteries: Insert three AAA batteries into the device and replace the battery cover. Plug in Measuring Wire: Plug the measuring wire into the socket of the device. Attach Lip Hook and File Clip: Insert the lip hook and file clip into the other end of the measuring wire. Power On: Short press the power button to turn on the device. Adjust Volume: Use the volume button to set different volume settings. Set Reference Point: Press the "Set" button to set the reference point between 0~1 mm, with numbers "00" to "0.6" displayed. Check Device Readings: After installing batteries and connecting the measuring wire, observe the number displayed on the screen (02, 03, or 04). Ensure proper connections of measuring wire, file clip, lip hook, and apex locator. Verify Device Functionality: If the device displays the apex sign, flashes "-3," all root canal length strips are lit, and there's a rapid beep sound, it indicates the device is working correctly. Install File Clip: Clip the file clip to the metal shaft of the file, pressing in the direction of the arrow, and then release to complete the installation. Position Lip Hook and File Clip: Connect the lip hook to the patient's lower lip and attach the file clip to the file inserted into the treated root canal. Monitor the display for indications of file progression into the canal relative to the apex. Monitor Strips and Numbers: While slowly moving the file into the root canal, observe the strips and number displayed on the device. The number indicates the remaining number of strips before reaching the major apical foramen. Apical Zone Reached: When strips turn green in the apical zone and the display shows "0.0," it means the major apical foramen has been reached, and a continuous beep sounds. Over-Apex Situation: If the file tip goes beyond the apex, strips turn red, the number becomes negative, and the label "APEX" blinks with rapid beeping.