4D code synchronous audio and video interrogation machine SDK-5 is a suitable for the public inspection system for raw data forensics disc burner. The machine is simple to operate, reliable in performance and reasonably priced. The industry's original optical raw data four-password (referred to as 4D code) encryption technology and dual optical drive "zero cache" data direct engraving technology, to ensure the originality, uniqueness and integrity of optical disk data. Products fully comply with the GA/T882-2010 "Digital Interrogation (Interrogation) Recording System Technical Requirements" industry standards.