https://goo.gl/PaVXbW
The World's Most Advanced Stair Climbing Hand Truck!

Powered stair climbing hand trucks help to reduce worker fatigue and the risk of injury, as well as reduce the number of employees needed to deliver cargo. Innovative edge-of-step sensor activates the brake when the truck approaches the next step, providing excellent load control while preventing the truck from accidentally rolling down the steps. Dual-speed control allows the truck to fit your working environment. Quick-change 24 volt sealed maintenance-free battery pack and charger offer exceptional performance:

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