Lenovo ThinkStation E30 - Manual (Page 12)

specification limits the computer’s 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 Lenovo computer came with headphones or earphones in the package,
as a set, the combination of the headphones or earphones and the computer
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.
Additional safety information
CAUTION:
Plastic bags can be dangerous. Keep plastic bags away from babies and
children to avoid danger of suffocation.
Rack shelf safety information
Your ThinkStation® computer can be used on a rack shelf. When installing the
computer on a rack shelf, make sure to leave at least a 12.70 cm (5 inches) space
between the front edge of the rack shelf and your computer for fire protection.
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ThinkStation Safety and Warranty Guide