The RCA RP3538 Micro Cassette Recorder is a compact yet powerful recorder perfect for lectures, interviews and anything else you want to record. It has a contoured design that makes it comfortable to hold and hard to drop. It has a built-in microphone •Automatic voice-activated record senses sound and starts recording automatically One-button record allows you to record with the push of a button Automatic level control provides a constant recording level regardless of the volume control setting External microphone jack 3-digit tape counter to easily track the location of your recording on the tape at all times