Just bought a Sound activated socket from Fleabay for £10 called "The Clapper".
Went looking again and just typed in sound activated plug and brought up this one which is virtually the same design i bought from fleabay buy at £2.99 + £1.60 postage making it £4.59.
Its been reduced from £4.99 .
If you bought 3 it would only cost you an extra £1.32 against what bought 1 for. 3 x £2.99 + £2.35 = £11.32
It works off 3 claps for on and 3 claps for off however it also has an away mode which is activated by any sound in a close vicinity. It turns it on for 10 minutes and then automatically turns its self off.
Might be handy for some.