Meteorite detector??

[gwzd]

Hello everyone,
Have anyone here seen the following unit working?

http://www.meteorlar.com/detector.html

If so, how close to the ground one has to be?
Any idea of what kind of sensor they use?
thanks
RA

[ivconic]

Looks like cheap stopwatch made in China. Probably it is...

[gwzd]

Looks like cheap stopwatch made in China. Probably it is...

Yes, kind of what I thought, that's why I'm interested to talk to someone who has seen it working. Appearances can be deceiving sometimes, although usually not.