A Bug! A Bug! The Bugger doth Come!
This is a bug / FM Transmitter I made off some electronics magazine's project in 1990. This isn't the original casing. Originally, the unit was built into a matchbox and powered by 2 x AAA batteries. Put the box of matches in someone's house and tune in with a pocket radio. It was easy back then cos the airwaves weren't as congested as now. The range is only about 50 meters in built-up areas.
We had loads of fun with this one listening to things not meant for our ears :)