Hearing loss Listening to sound at high volumes may damage your hearing. Background noise, as well as continued exposure to high volume levels, can make sounds seem quieter than they actually are. Use only compatible receivers, earbuds, headphones, speakerphones, or earpieces with your device. Turn on the audio and check the volume before inserting anything in your ear. For more information about hearing loss, see www.apple.com/sound. For information about how to set a maximum volume limit on iPod touch, see Music settings on page 46.

WARNING: To prevent possible hearing damage, do not listen at high volume levels for long periods.

Apple headsets The headsets sold with iPhone 4S or later in China (identifiable by dark insulating rings on the plug) are designed to comply with Chinese standards and are compatible with iPhone 4S or later, iPad 2 or later, and iPod touch 5th generation. Use only compatible headsets with your device.

Radio signals iPod touch uses radio signals to connect to wireless networks. For information about the amount of power used to transmit these signals, and about steps you can take to minimize exposure, see Settings > General > About > Legal > RF Exposure.

Radio frequency interference Observe signs and notices that prohibit or restrict the use of electronic devices (for example, in healthcare facilities or blasting areas). Although iPod touch is designed, tested, and manufactured to comply with regulations governing radio frequency emissions, such emissions from iPod touch can negatively affect the operation of other electronic equipment, causing them to malfunction. Turn off iPod touch or use Airplane Mode to turn off the iPod touch wireless transmitters when use is prohibited, such as while traveling in aircraft, or when asked to do so by authorities.

Medical devices iPod touch contains radios that emit electromagnetic fields. These electromagnetic fields may interfere with pacemakers or other medical devices. If you wear a pacemaker, maintain at least 6 inches (approximately 15 cm) of separation between your pacemaker and iPod touch. If you suspect iPod touch is interfering with your pacemaker or any other medical device, stop using iPod touch and consult your physician for information specific to your medical device. iPod touch has magnets near the bottom, and the included headphones also have magnets in the earbuds, which may interfere with pacemakers, defibrillators or other medical devices. Maintain at least 6 inches (approximately 15 cm) of separation between your pacemaker or defibrillator and iPod touch or the earbuds.

Medical conditions If you have any other medical condition that you believe could be affected by iPod touch (for example, seizures, blackouts, eyestrain, or headaches), consult with your physician prior to using iPod touch.

Explosive atmospheres Do not charge or use iPod touch in any area with a potentially explosive atmosphere, such as at a fueling area, or in areas where the air contains chemicals or particles (such as grain, dust, or metal powders). Obey all signs and instructions.

Repetitive motion When you perform repetitive activities such as typing or playing games on iPod touch, you may experience occasional discomfort in your hands, arms, wrists, shoulders, neck, or other parts of your body. If you experience discomfort, stop using iPod touch and consult a physician.

High-consequence activities This device is not intended for use where the failure of the device could lead to death, personal injury, or severe environmental damage.

Appendix B    Safety, Handling, & Support

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Apple ME643LL/A, MC903LL/A, MD724LL/A manual Appendix B Safety, Handling, & Support

ME643LL/A, MC903LL/A, MD724LL/A specifications

The Apple MD724LL/A, MC903LL/A, and ME643LL/A are notable models in the line of MacBook laptops, epitomizing Apple's commitment to high-quality design and cutting-edge technology. These devices cater to various user needs, from casual browsing to intense professional tasks, offering a blend of performance, portability, and sleek aesthetics.

The MD724LL/A, also known as the MacBook Air (13-inch, Mid 2013), showcases Apple's emphasis on portability. It features a lightweight aluminum chassis, weighing just 2.96 pounds, which makes it incredibly easy to carry. With a 13.3-inch display that boasts a resolution of 1440 x 900 pixels, the viewing experience is clear and vibrant, suitable for both work and entertainment. The device is powered by Intel's fourth-generation Core i5 processor, providing robust performance while maintaining energy efficiency, significantly enhancing battery life, which can last up to 12 hours on a single charge.

The MC903LL/A, representing the MacBook Pro with Retina display (15-inch, Mid 2012), offers a more powerful performance for users who require advanced capabilities. It features a stunning Retina display with a resolution of 2880 x 1800 pixels, delivering breathtaking visuals and sharp text. This MacBook Pro is equipped with quad-core Intel Core i7 processors, providing the necessary horsepower for demanding applications like video editing and 3D rendering. Additionally, its dedicated NVIDIA GeForce graphics card ensures high-performance graphics rendering, making it ideal for creative professionals.

Lastly, the ME643LL/A, another variant of the MacBook Air (11-inch, Mid 2013), is designed for those who prioritize portability without sacrificing performance. Similar to the MD724LL/A, it also utilizes Intel's fourth-generation processors but in a more compact 11-inch chassis. This model weighs just 2.38 pounds and still offers impressive battery life, appealing to students and professionals on the go. With a resolution of 1366 x 768 pixels, this display strikes a good balance between size and usability.

All three models incorporate advanced features such as fast flash storage, which enhances application loading times and overall system responsiveness. Additionally, they come with a variety of connectivity options, including USB 3.0 ports and Thunderbolt, allowing for seamless integration with peripherals and external displays.

In summary, the Apple MD724LL/A, MC903LL/A, and ME643LL/A models represent a versatile range of MacBooks that cater to different user needs, embodying Apple's passion for innovation, design, and performance. Each model provides distinct features and technologies, ensuring that whether you are a casual user or a professional creative, there is an Apple laptop that fits your requirements.