Expo - Marker - for glass, whiteboard - black (pack of 12)

I now have several of these monitors and they seem to be chasing my moles out of the yard, both front & back yard.

So far it's working but, sound is so low can't tell if it is really working ? My older one is working louder than this one and it only cost $14.95 and I had this one for more than 4mos. I think I will be returning it very soon if does not work well.

Very disappointing. The construction is flimsy. Very easy to break wiring, the conical tip where the speaker is located won't stay in the main pipe body. Good luck trying to pull it out of the ground in one piece. So I tore the wires and had to screw them together twice. But they apparently came apart from the vibrations very soon, in a few days it stopped working. I suspect i need to dig it out of the ground again and solder or use tiny wire caps to connect them. Which will not be easy for reasons mentioned above.

Did not work do not buy this.

DO NOT BUY THESE! They kind of worked when I first got them but they BOTH died after 2 months! Waste of money :(