What can I say- It is an almost useless device but it is great fun and looks so cool, in a geeky Star Trek sort of way. It looks and sounds exactly like the ones used on the original Star Trek TV series. The two motion sensors work surprisingly well and trigger either the sound of the ships doors opening (They were originally operated by hidden stage hands during filming.), or that of the red alert klaxon, as someone walks by.
The unit is well built and the sounds are very clear with little distortion.
Beam me up Scottie.