Convenient to handle as the control switch has magnetic plates and can be fixed everywhere on the frame, or simply hold it in your hand. Working with the Stair Robot Transporter is continuously trouble free, as you can simply switch from working on level grounds to stairs and vice versa. Due to battey operation, the operator ist independent from electric supply and the stair robot transporter can be used anywhere. The rechargeable dry battery is included in delivery. Batteries can be changed easily.