The Truth Cam Supercharged Blackout Hd With Early Detect Sensor Allows For 12 Months Of Undetectable Surveillance. The Early Detect Has A 45 Pir Sensor That Picks Up Motion Earlier So You Don T Miss What Is Walking In Front Of Your Camera. The Supercharged Battery Case Allows You To Add 16 Additional Aa Batteries To The 8 Already In The Truth Cam Ultra. With A Total Of 24 Aa Batteries You Get 3x More Life And Will Be Able To Capture More Photos.