Apple MC239LL/A User Manual - Page 59

Hearing damage Permanent hearing loss may occur if earbuds or headphones are used at high volume. You can adapt over time to a higher volume of sound that may sound normal but can be damaging to your hearing. If you experience ringing in your ears or muffled speech, stop listening and have your hearing checked. The louder the volume, the less time is required before your hearing could be affected. Hearing experts suggest that to protect your hearing: Â Limit the amount of time you use earbuds or headphones at high volume. Â Avoid turning up the volume to block out noisy surroundings. Â Turn the volume down if you can't hear people speaking near you. High-risk activities This computer system is not intended for use in the operation of nuclear facilities, aircraft navigation or communications systems, air traffic control systems, or for any other uses where the failure of the computer system could lead to death, personal injury, or severe environmental damage. Laser Information for Optical Disc Drives WARNING: Making adjustments or performing procedures other than those specified in your equipment's manual may result in hazardous radiation exposure. The optical disc drive in your Mac mini contains a laser that is safe in normal use but that may be harmful to your eyes if disassembled. For your safety, have this equipment serviced only by an Apple Authorized Service Provider. Chapter 4 Last, but Not Least 59