Portable Micro Cassette Dictating Machine Sony M-560V Microcassette System : Inclues 3 microcassettes- Voice Operated Recording (VOR) With Mic Sensitivity Adjustment : activates the recorder only when audible sound is present, conserving the tape and eliminating soundless pauses. Lock Switch : locks controls to prevent accidental activation of any function. Dictate Conference Switch LED Record/Battery Indicator : verifies when unit is in Record mode and confirms battery strength. 3-Digit Tape Counter : gives you a visible measure of tape elapsed for rapid access when editing and listening. 2 Record/Playback Speeds : gives you the option of using a standard microcassette for an extended recording or dictation as long as 2 hours. Audible End of Tape Alarm : sounds an audible alert when the end of tape is reached. 3-Digit Tape Counter Power Battery Life (Approx.) : Up to 9 Hours (Up to 9 hours with Alkaline Batteries; Up to 2 hrs with Rechargeable Battery) Battery Type : "AAA" x 3 Output Power : 250mW Power Requirements : 120V AC Adaptor (Optional) Speaker Speaker Dimensions : 1" (28mm) diameter Type : Mono x 1 (Built-in) Audio Features Microphone Sensitivity Feature : Yes Recording Features : Voice Operated Recording (VOR) Audio Frequency Range : 300-3500Hz (2.4 cm/sec) Microphone : Built-In Electret Condenser Recording System : 4 Track, 1 Channel Monaural Microcassette Tape Speed : 2 Speeds (2.4cm/sec, 1.2cm/sec) Inputs and Outputs DC-In : 3V Headphone Output(s) : 1 (Stereo Mini) Microphone Input : 1 General Recording and Playback Times : up to 120 minutes (mono) Recording Media : Micro Audio Cassette Type of Use : Portable Voice Recorder Weights and Measurements Dimensions (Approx) Depth : 15/16" (23.4 mm) Dimensions (Approx) Height : 4 7/8" (122 mm) Dimensions (Approx) Width : 2 3/8" (60 mm) Dimensions (Approx.) : 2 3/8" x 4 7/8" x 15/16" (60 x 122 x 23.4mm) Weight (Approx.) : 6.5 oz (185 g)