Fast erase. Works with AC adapter (sold separately). Optional headset (sold separately). Records to mini cassette (sold separately). Includes end-of-tape/no-cassette warning, built-in microphone, LED record indicator, LED battery indicator, external microphone jack, quick record/quick review. Easy one-handed control. Slide switch. Recording Functions: Quick Record; Telephone Record; Activation/Review Functions: Cue & Review; Quick Earase; Quick Review; Voice Activation; Foot/Hand Controls: Four-Position Slideswitch; Microphone: Built-in.