Sennheiser MM 400 Instructions for Use - Page 4

Important safety instructions Intended use Intended use of the headset includes • having read this instruction manual, especially the chapter "Important safety instructions" on page 2, • using the headset within the operating conditions and limitations described in this instruction manual. DE "Improper use" means using the headset other than as described in this instruction manual, or under operating conditions which differ from those described herein. EN Safety instructions for the Lithium-Polymer battery pack If abused or misused, the battery pack may leak. In extreme cases, it may even present FR • a heat hazard, • a fire hazard, IT • an explosion hazard, • a smoke or gas hazard. Please understand that Sennheiser does not accept liability for damage ES arising from abuse or misuse. Keep away from children. Do not pack charged batteries loose - danger of shorting NL out/fire hazard. Observe correct polarity. Do not short-circuit. Dispose of the battery pack at special collection points or return it to your specialist dealer. Only charge the battery pack with the appropriate Sennheiser chargers. Only charge the battery pack at ambient temperatures between 10°C/50°F and 40°C/104°F. Do not mutilate or dismantle. Immediately remove the battery pack from an obviously defective device. Only use the original Sennheiser battery pack. Switch battery pack-powered devices off after use. When not using the battery pack for extended periods of time, charge it regularly (about every 3 months). Do not heat above 70°C/158°F, e.g. do not expose to sunlight or throw into a fire. Do not continue to use a defective battery pack. When not using the device for extended periods of time, remove the battery pack from the device. Do not expose to moisture. 3