Record and review with ease... Sony's TCM-210DV Standard Cassette Recorder includes an AC adaptor and cassette to conserve batteries and provide virtually unlimited recording and playback time when an AC power source is available. In addition, features like Double recording time, Voice operated recording, Playback speed control, 25 hour battery life with 2 "AA" batteries, Automatic shut-off (at tape end), One touch recording and playback, Sony-Matic automatic recording level control, and the Clear Voice recording system help you get it all on tape. Utilize the Built-in microphone, LED battery level indicator, External microphone jack, Stop/Pause release function, and the Cue and review function as you enjoy improved sound from the large playback speaker.