Compatible models: CDs, CD-ROM, CD-R/RW, DVD±R/RW, DVD-ROM/RAM, DVD Recorders, DVD Game Consoles; Use the cleaning solution to quickly remove tough dirt and oil film, etc. ● Special fiber brush removes dirt and effectively removes dust ● Comes with a stereo check function so you can check the connection of the speaker. ● Melodies will flow during cleaning. Cleaning guide: It is recommended that you clean once for 60 hours (player usage time). (Depends on usage environment)