A depth limiting shovel having a blade with a vertically extending slot therein, a depth limiting member having a horizontal element and a vertical element slidable within the slot, the horizontal element extending transversely across the blade. A wireless communications network may be configured to allow a user equipment to combine multiple demodulation reference signals to support demodulation of a physical downlink shared channel, andor other downlink transmissions, transmitted from a base station to the UE. The touch screen is activated to display an unlocking area if no object is detected within the predetermined distance of the distance sensor. An indicator communicates the status of the decontamination process.