This article is from the CD-Recordable FAQ, by Andy McFadden (firstname.lastname@example.org) with numerous contributions by others.
CRW2410MR (32x24x10/?MB; external USB2.0)
CRW3210A (40x32x10/?MB;IDE 'AI' is USB2.0)
CRW4012P (48x40x12/?MB;IDE, 'EU' is USB2.0)
CRW5224P (52x52x24/2MB;IDE, 'WU' is USB2.0)
A user who was getting nothing but power calibration complaints with the
CRW1032A and firmware 7.EZ found a laser power adjustment tool in the
7.GZ update from the www.acercm.com site. The North American version
reportedly doesn't come with the tool, but it may not be needed.