Etymotic ER•4® microPro® Earphones - Manual (Page 10)

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ABOUT ET YMOTIC RESEARCH PROPER C ARE
• Do not expose the earphones to extreme temperatures.
• Avoid dropping and strong impact.
• Leave eartips on the earphones for shock protection.
• Do not pull on the cord to remove the earphone from the audio
device or the ear.
• Clean or replace eartips prior to use by others.
• For best performance and retention in the ear, replace 3-flange eartips
every 60-90 days.
• Replace foam and glider eartips frequently.