Lift-N-Set Shelves: Position shelves at any height in 2/3" increments, and store your devices in landscape or portrait orientation, depending on size and position of the power inlet and on/off button. Pop-N-Go Bays: Bays are easy to adjust; simply pop them out of place and position them at any width in 1/3" increments. The cart ships configured for 20 units with .87" bays. IT Friendly: A separate locking IT area on the side keeps cables and power adapters protected and secure. The 21 power outlets are easy to reach, and two roomy bins store power adapters and cable bundles so they're tidy and accessible. Safe and Secure: The front user area and side IT area have keyed locks for security. For extra peace of mind, you have the option of positioning a padlock to block access to the handle. Mounting holes in the base make it easy to bolt into place. Charging Station Type: Laptop; Screen Size (Max): 10"; Device Capacity: 20; Compatible Devices: Tablets; Mini Tablets; e-Reader; Smartphone.