The main technical specifications: 1 Model: Apex Locator 2 Dimensions: 4.33" (Length) ×2.64" (Width) × 2.05" (Height) 3 Weight: 3.28 oz 4 Battery: 3.7V/750mAh 5 Adapter: 5V/1A 6 Consumption power: ≤0.5W 7 Screen: 3.2' LCD 8 Buzzer alert: The buzzer will alert when the file is less than 2mm closed to the apex. 9 Operation condition a) Environment temperature: 0～40℃ b) Relative humidity: 10～85%RH. c) Atmosphere pressure: 60kPa～106kPa Package: 1*Main Device 2*Lip hook 2*File clip 2*Touch probe 1*USB Adapter 1*Measuring wire 1* English Manual