Does exactly why I bought a copy. I was looking for a slave master socket to power a variety of devices at once. This one was installed behind my pc. Master: turn. Slave: screen, speakers. Result (after adjusting the sensitivity screw): perfect, when the tower is lit, the rest is supplied and lights when the tower goes out, vice versa. The only (very small) Default: One benefit of the slaves and masters taken to eliminate certain vigils device (LED remaining on) ... What she does perfectly, only, this decision has also led, which remains on all the time. No comments on the function of surge protection, I am not interested in me because I have not bought it.