Havis In-Vehicle Power Management System. Auto-Shut Off Timer is a self-contained unit that provides circuit protection for a vehicles power system. Regulated with a programmable timer, will prevent dead batteries. On Board LED Indicates under/over voltage situations. Compliments In Vehicle Mounting of Havis Toughbook Certified Vehicle Docking Stations or Cradles that support the Panasonic Models: CF-18, CF-19, CF-30, CF-31, CF-52, CF-53, CF-H1, CF-H2, CF-U1 & FZ-A1 Computers / Tablets.