ATN NVB5X-3 Gen 3 Night Vision Monocular offers the highest magnification for a Night Vision Bi-ocular in the industry. Waterproof and able to withstand the rigors of almost any environment, this unit will give you the range and clarity that others simply can not touch. Detachable long range infrared illuminator, multi-coated all glass optics for clarity and distance, amazing 5x magnification. Optional IR-450 IR Illuminator available. Requires 3V lithium battery, included; 10-20 hours of expected battery life. ATN Corp manufactures and distributes the widest array of Night Vision and high quality optics in the world. We are a sales and market leader in the US. Unsurpassed customer service on both our website and 800#, our technicians are the most knowledgeable in the world. We manufacture for the US Military, law enforcement, the FBI and the US Department of Homeland Security.