CPO PLUS - Code Practice Oscillator plus CP2 cable. Need to learn how to use a bug or straight key without the key connected to a radio? Our CPO with CP2 cable is ready to use. Includes CPO board, speaker, cable. Add 9V battery. 700 Hz tone from LM386 audio chip @350 mW output power. Not an electronic keyer - for use with bugs and straight keys only.
