This tiny but versatile unit offers an incredible 90 hour recording capacity with 64Mb internal memory, excellent sound quality, and features found only in the Diasonic DDR-3000 series. For voice recording, the DDR-3064 offers a high quality built-in microphone as well as an included "tie clip" type microphone. By switching on the "ARS" (automatic recording system), a voice activation and automatic gain control circuit takes over and only records when sound is present, eliminating blank spaces in recording. For telephone recording, simply connect the included analog telephone recording control module to your single line phone jack and all your phone calls , from any extension on line, will be automatically recorded with crystal clarity. Recorder will begin recording when a call is started and stop when conversation is complete. The AC adaptor offers unlimited power for telephone recording. Due to the exclusive "AUTO FILE ADVANCE" feature, each call will be "indexed" with complete time/date stamp info. Also included is a "hands free cell phone recording adaptor", allowing easy hands free recording of your important cell phone calls. High Speed USB Upload All of your recordings can be quickly uploaded via USB port to your PC at a super fast 1000X speed. You may elect to simply play back your recordings on the built in speaker or re-record to a cassette for permanent storage. In any case, all necessary software and cables are included with the unit. The DDR-3000 series is also an excellent MP3 player with included mini hi-fi stereo earphone speakers. For the executive on the go, this unit can be utilized as a "pocket hard drive" to transport your important data to another computer. Versatility and dependability are the DDR-3000 series from Diasonic, the world authority on digital audio recording.