A shower radio is a battery-powered radio that is waterproofed to allow it to be used in a bathroom or other wet environment. 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.
There are varying designs; some are meant to be hung from a pipe or shower rod, while others can be stuck to the wall of the shower using a suction cup or something similar. Shower radios may be analog or digital. More recently, water-powered and wind-up radio designs have been produced to completely remove the requirement for batteries, though smaller capacity rechargeable batteries are used to some extent on hand-crank devices.
Shower radios can be paired with FM transmitters since it can allow people who listen to their iPod or similar to be able to enjoy their favorite album or playlist while protecting their iPod, smartphone or other portable media player in a dry environment not too far from a shower. For this reason, most portable media players aren't water-resistant enough to be used in showers, sometimes FM transmitters can be used with desktop computers and laptop computers in a room not too far from the bathroom paired with an FM transmitter, though bluetooth serves a somewhat similar purpose for other shower radios that support bluetooth.
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