Two-Wire System Wall Mount Sound/Light Activated Light Switch (180~240V)

Pros: the switch is easy to understand /install and use
comes packed neatly - so no scratch , and good condition
the electric holes for the wires are big enough to hold 1-3 Quardrat copper wire
as well the sound level it is sensetive to is very good - meaning even a sudden -Boo!- will operate it .

Cons: the shape of the circuit box is square and a bit big in diameter then the usual hole-in-the-wall socket - so some adjustment is needed

Other: i think it will be idle in toilets - where short time is spent there
but not for living room for example

Pros: It is exactly what I was looking for for my stairs. They are closed from all sides and with two corners, so movement sensor isn't good choice. On other side this voice sensor works perfectly. It isn't to sensitive, so loud voices, chair moving ... from other room don't trigger the light.

Cons: The square back that goes into the wall doesn't fit in the standard round hole for round switches etc.

Other: Very good product if movement sensor isn't suitable solution. I recommend it!