The KES-400AAA laser is known to work with the following models: CECHE03, CECHA03, CECHC03, CECHG03, CECHB0 and CECHC03 but more variants accept the KES-400AAA laser assembly. Please contact the seller for more information. Generally older models with 4 usb ports accept the KES-400AAA while the 2 usb models use the KES-410CA laser assembly.