Listen to CW words, letters or groups at various speeds and formats. Designed to make it easy to recognize Morse code characters at various speeds. Improve existing CW skills for those who already know the code. Code oscillator outputs tones from 5 to 39 words per minute. Tone frequency is adjustable from 500 Hz to 2.9 kHz. Choose from Over 100 programmed character sequences. Optional alphanumeric cues. Optional voice cues. Loop mode plays the selected character sequence continuously.