1. Support U disk function 2. Rechargeable Li-ion battery 3. The spy voice recorder offers a long play recording mode 4. This digital voice recorder supports Windows 2000/XP/Vista/win7/Windows Me.Windows 98SE/Windows 98.Mac OS 9 and higher Specifications: Size：70mm x 21mm x 9.4mm Recording Formats：WAV Power Supply：Li-ion battery Operating System：Windows 2000/XP/Vista/Win 7 Recording Bitrate：128K bps USB Port：USB 2.0 Frequency Response：20Hz-20KHz Max Audio Output Power：greater than equal 5mW Working Temperature：0~40oC Color：White-blue Package Included:1 x Voice Recorder Pen Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.