Magnification : 4X
Lens diameter : 50mm
Eye relief : 12mm
Exit pupil : 4mm
Diopter adjustment : ±5
Resolution : 582×500 pixels
Max. detection range : 984ft
Power supply : 3V(1xCR123A)
4X50 Digital Infrared Monocular Telescope Nightstar Optics -NS41450
984FT LONG VIEWING RANGE WITH 4X MAGNIFICATION: The 50mm multi-coated lens and 4x optical magnification which provide you a clear view up to 984ft and easier to capture distant moving objects