Original Emergency Marker Light MS-2000(M) is a lightweight, compact, battery-powered, portable device designed for use as a multi-functional light in emergency and/or secret special operations situations.The light uses a xenon flash lamp, is powered by two AA batteries and is operated by a magnetic reed switch. The light is designed for one-handed operation and can be operated either by hand or attached to any object. The Flashguard shield contains both an IR and a blue filter. The IR filter ensures omnidirectional transmission of IR wavelengths. The blue filter is used for light transmission in the direction of vision. The IR filter is designed for use in secret operations.The MS-2000(M) is powered by two 1.5V AA alkaline batteries (not included) located in the bottom of the main body. A secured battery door is fitted with an “O” ring seal to ensure its watertight integrity. Devices are unused and in new condition, were stock goods.Date 2011, Price is for one piece ! These are original devices from a well-known manufacturer, 100 % original condition , No cheap Chinese imitations!!!!!! Note that all our items are pure collector items or display items. The items are not tested for real use and have no aeronautical exams or clearances. Use is at your own risk !