A shower radio is a battery-powered radio that is waterproofed to allow it to be used in a bathroom or other wet environment. More generally, a shower radio is a shower speaker with an integrated radio functionality. Some versions also include a CD player and/or a clock. Shower radios generally lack headphone jacks and AC adapter ports, which could short out or electrocute the user. For the same reason, they also tend to lack external antennas.