Rotate the scope dioptric adjustment wheel to maximum; 2. Fix the IR camera on eye relief position of the rifle scope. Rotate the adjustable diopter lens to see the screen menu (the letter and icon on the screen) clearly. Rotate the night vision device internal sight to get a clear image. Long press the IR button for 3 seconds to turn on the IR torch, night mode will be activated automatically. Adjust the direction of the IR torch to overlap the view of the scope. Push in the IR torch hood to get low beam for short distance aiming. Pull out the IR torch hood to get high beam for long distance aiming. Display: 1.3inch 240240p TFT Camera: 16MM Lens Flashlight: Infrared Flashlight Flashlight Wavelength: 850nm Flashlight Maximum Visible Distance: LED IR up to 100m; Laser IR up to 400m Battery:1PC 18650 Working Time Of Battery:1500mah 1.5hours;if IR turn off, 5hours 2600mah 2.5hours;if IR turn off, 8hours Voltage: 3.7V Video Resolution: 1920720 Focus:3cm-? Functions: HD720P/ Photo&Video Record Unique Design: Super Anti-shock.