Available capacities: 128MB, 256MB, 512MB, 1GB, 2GB, 4GB Video Recording: Yes (record conceals in the PEN, idea for kinds of hidden surveillance purposes, like for police to get the audio and video evidence) Camera: CMOS Camera concealed in the PEN (2 million pixels) Pen writing function: Yes (It is a recorder, at the same time, it is also a pen, enable kinds of hidden surveillance activities to be easy) Audio Recording: Yes (Audio record in around 15) Video Compression Format: AVI video format at 352*288, real time recording Video playback: By Windows media player with PC Video file size: >500KB per minute Recording mode: continuous recording unless the memory is full or manual stop Build-in memory: 1G USB interface: USB 2.0 Power supply: By Build-in rechargeable Lithium-ion Battery, (working time: appr.100 minutes by one charge), no external cable and nice for hidden record purpose Power Adaptor: with power adaptor supplied Record time: up to 3 hours Dimension: 1.5cm(Diameter) x 15cm(L) Weight: 30g