Lenovo A680 User Manual

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12Lenovo Phone has a headphone connector. Alwaysuse the headphone connector for headphones (alsocalled a headset) or earphones.CAUTIONExcessive sound pressure from earphones and headphones can causehearing loss. Adjustment of the equalizer to maximum increases theearphone and headphone output voltage and the sound pressure level.Therefore, to protect your hearing, adjust the equalizer to an appropriatelevel.Excessive use of headphones or earphones for a longperiod of time at high volume can be dangerous if theoutput of the headphone or earphone connectors donot comply with specifications of EN 50332-2.The headphone output connector of Lenovo Phonecomplies with EN 50332-2 Sub clause 7. Thisspecification limits Lenovo Phone's maximum wideband true RMS output voltage to 150 mV. To helpprotect against hearing loss, ensure that theheadphones or earphones you use also comply withEN 50332-2 (Clause 7 limits) for a wide bandcharacteristic voltage of 75 mV. Using headphones thatdo not comply with EN 50332-2 can be dangerous dueto excessive sound pressure levels.If Lenovo Phone came with headphones or earphonesin the package, as a set, the combination of theheadphones or earphones and Lenovo Phone alreadycomplies with the specifications of EN 50332-1. Ifdifferent headphones or earphones are used, ensurethat they comply with EN 50332-1 (Clause 6.5