The ATN Mo4-cgt Comes Standard With Our Cutting Edge ""smart"" Technology, this Technology Consists Of A Computerized Proximity Sensor, Digital Controls And A Long-range Infrared Illuminator, The Proximity Sensor Will Automatically Turn The Unit On And Off When It Is Brought To The Viewing Position, This Helps To Save Your Battery Life And The Life Of The Unit Itself, L: 8"", W: 3"", H: 2"" SKU: AMTECH380