The' LapCabby 20 Vertical' charges 20 devices up to 17" screen size laptops and Chromebooks including protective cases. Sliding shelves store devices vertically with dividers and specially moulded rubber mats hold devices in place. Cable management clips prolect lose cables from damage. The LapCabby offers fast,flexible and simultaneous charging with a programmable timer. Maximum security & safety with dual point locking system and separate lockable power compartment. Easy to move with ergonomic top handles, rounded corner bumpers and multi-directional non-marking wheels. The built-in heat sensor shuts down the unit if over-heating occurs.