Bought an Annoy-o-tron from eBay:
https://rover.ebay.com/rover/0/0/0?mpre ... 3393797404Emits a high pitched beep at random intervals between 5 - 120 minutes.
The button battery means it can run for three months!
I've hidden under the veneer in my colleagues desk, inside a tiny gap and glued back over it.
He's off today and tomorrow.
I'll report back Monday.
Edit: it's just gone off. That's amazing! There's no way he'll trace it!
Victor Mildew wrote:.
Ad, you need one for the office. Get revenge on those banana splits.