http://www.supercircuits.com/Digital-Video-Recorders/ There are many DVR recorders available nowadays. A digital video recorder is an electronic device which can record video in a digital format to USB flash drive, disk drive, or SD memory card. Digital video recorders include JPEG and MPEG-4 for 4/8/9/16 camera DVR security systems. Many DVR recorders are networkable which allows remote Internet access to the system.