It incorporates a combination light switch/outlet. The outlet is always ... and then find the nearest existing outlet to ...

see Wiring Switches and Outlets). Locate the circuit breaker or fuse that controls the outlet you plan to replace and shut off the power to the circuit. Plug a lamp, radio or the GFCI tester into ...

They're also suitable for garages and exterior use, though you'll still want to protect the outlet from the elements with a cover or enclosure. GFCI receptacles protect against power surges ...