... compact portable hand held night vision devices.excellent optical systems and advanced Gen 1 image intensifier tube Our night vision NV-1 are ... ,helpinginvestigation and obtaining evidence etc.Binger Night vision technical specifications:Lens magnification ,x 3 Objective lens diameter,mm 44 Lens ... Exit pupil diameter,mm 6 Eyepiece Dioper adjustment,dptr +4,-4 Eye relief,mm 15Power supply,v AA battery ( ...