Optimus 120-2154 - Manual (Page 3)

The CD player in this stereo system is made and tested to meet exacting
safety standards. It meets FCC requirements and complies with safety
performance standards of the U.S. Department of Health and Human Service.
WARNINGS: This system employs a laser light beam. Only a qualified
service person should remove the cover or attempt to service
this device, due to possible eye injury.
The use of controls, adjustments, or procedures other than
those specified herein might result in hazardous radiation
exposure.