Unique electronic controller; Auto shut-off and manual gain control; Multiple battery compatibility (AA or CR123); Automatic on/off switching system when articulating the device out of your view; More compact and lighter than a conventional PVS-14: 4.25 in / 108 mm and 10.2 oz / 290 g; Easy-to-use controls and adjustments; Versatile mounting options; Manual gain control; Built-In IR illuminator; Waterproof and rugged