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MFJ Enterprises Original MFJ-557 Deluxe Morse Code Practice Oscillator Straight Key w/Volume ControlThe MFJ-557 Deluxe Morse code Practice Oscillator features a Morse code straight key on a non-skid heavy steel base -- it stays put on table and doesnt move around while youre sending The MFJ-557 lets you practice sending code at home, work, riding i..