Multi Device Charging: 30 ports laptop charging cart provide fasting charging and security storage compatible for, Windows, Chrome Booktablets. It is ideal for school, library, hospital, exhibition, airport,training center, etc. Caster: Charging cart with good quality Universal Wheel makes them quiet enough and easy pushing during moving. It is quickly and easily transported even it's full loaded. Charge & Store 30 Devices: Designed for 30 notebooks and versatile enough to support most tablets, laptops/hybrids and notebooks. Locking & Safety: Charging cart with lock & key for the front and back door, will Protect your devices when it's in working or you are moving the cart. And 2 locking caster wheels will keep cart in place. Easy to Use: Cable management Bar make it easy for you to tidy power line and organization of cords. All steel construction is fastness and durable, good anti-rust treatment and you will never worry about rust problem.