The Bretford TCOREX36-WL is a Core X charging cart AC for up to 36 devices with back panel and wheel lock. It is designed to accommodate larger mobile devices, this cart features adjustable slot dividers and the most innovative digital timer power management system yet. Each shelf can support 10-12 devices while interchangeable numbering bars keep devices organized. The adjustable dividers allow modification of slot size from 1.25" to 1.5" to support various sizes of devices. This cart has cable hooks help keep your devices and power cords in the right slot. This model offers an additional storage space in the rear power compartment that provides improved support for larger power adapters while the redesigned digital timer system assures devices are charged quickly with a single cord from the cart to a nearby wall outlet. The Bretford TCOREX36-WL is designed and UL certified for safety, with a lock and sturdy solid steel construction to help keep your mobile devices secure.