The Ultimate Micro Oscillator.
Lightweight Morse Code Oscillator For Your Telegraph Keys
555 Circuit With 3.5mm key jack. Adjustable tone & Made from biodegradable 3d printed PLA polymer.
Oscillators are run on 2ea. 2032 lithium batteries and any 3.5mm receptacle cord.
Great for practicing & learning morse code.
Opens with inset tabs for easy access to change the battery.
We Will Do Our Best To Answer Them For You 😀