It uses the Newton's operating system and software. Programs and data are securely stored in flash memory rather than on a hard drive. The battery should last 20 hours or more. Keeping the screen's backlighting on for viewing in very dim light cuts battery life. It answers when a call comes in, and if a fax is being transmitted stores the document in its internal flash memory.
Storage capacity depends on the density and resolution of the faxed pages.
The unit works with Windows, DOS, or Macintosh operating systems. When its motion sensor is disturbed, the Auto Taser emits a painfully loud siren. If that's not enough, it soon begins shooting out blue sparks. Anyone stupid enough to then try to touch it receives a memorable electric shock. The manufacturer says it won't hurt or kill, just stun and scare.