The Ultimate Micro Oscillator.
Lightweight Morse Code Oscillator For Your Telegraph Keys
The Ultimate Lightweight Morse Code Oscillator With 555 Circuit & 3.5mm Jacks.
Adjustable Tone & Great For Practicing & Learning Morse Code.
Opens with inset tabs for easy access to change the battery.
Can also be turned on & off to save battery life.
Works With Straight Keys Only.
The Oscillator Uses Two CR2032 Lithium Batteries For A Total Of 6Volts.
Made from biodegradable 3d printed PLA polymer.
We Will Do Our Best To Answer Them For You 😀