This pen could be used: 1.As a normail ballpoint pen to write 2.As a mp3 player to store and play your favorite songs 3.As a recorder to record meeting, conversations and lectures.(recordings can be listened to directly from the pen or uploaded to your computer for playback) 4.As a flash drive to transport all your important files with you 5.To take verbal notes while you are working 6.Very small, light-weight, is suitable to reside in your shirt pocket. 7.To secretly record conversations with persons whom you engage in conversation. Product Feature: Built in FLASH memory (128MB/256MB/512MB) High Quality MP3 and WMA, ASF music Format Playback Included USB Cable Connector easily Docks to any USB jack Without LCD Display Superb quality Digital Voice Recording in WAV audio format A-B Repeat playback USB Bus Battery recharge Built-in 3.7V re-chargeable Li-Ion Battery Up to 8 hr MP3 playback time Upgradeable firmware included Windows 98 Driver, required for Win2000/ME/XP Metal casing USB2.0 Full speed" Compatible with windows 98/2000/ME/XP, Mac 9.X and above NET Weight:41g Size:149MMx15.3MM(length x diameter) Package: A metal box contains: 1 digital voice recorder pen mp3 Player, 1 beautiful earphone, 1 brand new mp3 charger, 1 USB cable. 1 driver CD This is the best one among all digital voice recorder ballpoint pens on the market. 1.Because the built-in Mic is good quality and sensitive, It has the best sound recording quality (very clear recording) and could clearly record sound 10 meters away 2.The keys are very sensitive, respond quickly to all pushes 3.The size of keys are moderate, so it is very easy to use. We could also supply pens without our trademark etched on.