Lenovo A706 Smartphone - Manual (Page 15)

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maximum wide band true RMS output voltage to 150 mV. To help protect
against hearing loss, ensure that the headphones or earphones you use
also comply with EN 50332-2 (Clause 7 limits) for a wide band
characteristic voltage of 75 mV. Using headphones that do not comply
with EN 50332-2 can be dangerous due to excessive sound pressure
levels.
If your Mobile phone came with headphones or earphones in the package,
as a set, the combination of the headphones or earphones and the Mobile
phone already complies with the specifications of EN 50332-1. If different
headphones or earphones are used, ensure that they comply with EN
50332-1 (Clause 6.5 Limitation Values). Using headphones that do not
comply with EN 50332-1 can be dangerous due to excessive sound
pressure levels.
This device has been tested to comply with the Sound Pressure Level
requirement laid down in the applicable EN 50332-1and/or EN
50332-2standards. Permanent hearing loss may occur if earphones or
headphones are used at high volume for prolonged periods of time.
Warning statement:
A pleine puissance, l'écouteprolongée du
baladeurpeutendommagerl'oreille de l'utilisateur.