Whenever visual observations under low-light or even no-light conditions have to be effected, the use of a professional night vision device is indispensible. With these two PKI 5210 / PKI 5220 Nightvision Monocular, Nightvision Binocular units, whether monocular or binocular, such tasks can easily be fulfilled. These extremely lightweight but robust night vision devices have been designed for operation under all weather conditions and at any light level. Even in complete darkness these units will work due to the built-in IR-illuminator being invisible to the human eyes. Each type, whether the PKI 5210 Nightvision Monocular, Nightvision Binocular or the PKI 5220 Nightvision Monocular, Nightvision Binocular provide a sharp and clear picture of the area to be surveyed and is therefore especially useful for police, customs, security guards and border controls. Each type is waterproof and another main advantage is the low power consumption which allows an outstanding operating time of approx. 50 hours continuously with one set of standard batteries. Different adapters optionally can be supplied to connect the PKI 5210 / PKI 5220 Nightvision Monocular, Nightvision Binocular to cameras or camcorders.