Optimus 120-1998 - Manual (Page 2)

Locking Fast Forward - quickly fast-forwards the cassette tape with the
touch of a button.
Advanced FM Optimizer Circuitry - Automatically adjusts the tuner's stereo
separation and high-frequency response
regardless of the signal level, giving
you the best possible sound.
Built-In Noise-Suppression Choke - reduces the noise caused by your
vehicle's electrical system.