A cover or shield for a mobile radio includes a first cylindrical portion configured to fit a first knob, a second cylindrical portion configured to fit a second knob, and a bridge. A first end of the bridge may be fixed to the first cylindrical portion, and a second end of the bridge may be fixed to the second cylindrical portion. The bridge may be configured to orient the first cylindrical portion and the second cylindrical portion in alignment with the first knob and the second knob, respectively. In one example, the first cylindrical portion includes a cut-out configured to allow manipulation of the first knob by an operator of the portable radio. In another example, the second cylindrical portion is shorter than the second knob providing access to an upper section of the second knob by an operator of the portable radio.