Hamm has fine-tuned every aspect of the HD 10e and HD 12e electric rollers to preserve resources. For instance, they feature an automatic motor-off function, which deactivates all functions when the machine is stationary in order to save battery power. When ECO-Mode is selected, the control limits the working speed. This also saves energy, as does the LED lighting, which is fitted as standard. The innovative steering control also helps to save energy: In the park position, it uses no energy at all, and the steering motor does not switch on until the electric driving lever is actuated.