Sennheiser HDE 2020-D-II Instruction manual Tourguide 2020-D - Page 5

Important safety instructions permissible volume which is by law (in some countries) allowed to affect your hearing for the duration of a working day. It is used as a basis according to the specifications of industrial medicine. Higher volumes or longer durations can damage your hearing. At higher volumes, the duration must be shortened in order to prevent hearing damage. The following are sure signs that you have been subjected to excessive noise for too long a time: • You can hear ringing or whistling sounds in your ears. • You have the impression (even for a short time only) that you can no longer hear high notes. Inform all users of these risks and ask them to set the volume to a moderate level if necessary. Intended use The product is designed for indoor and outdoor use. The product can be used for commercial purposes. It is considered improper use when the product is used for any application not named in the corresponding instruction manual. Sennheiser does not accept liability for damage arising from improper use or misuse of this product and its attachments/accessories. Before putting the products into operation, please observe the respective country-specific regulations! Sennheiser is not liable for damages resulting from the loss of connection due to flat or overaged (rechargeable) batteries or exceeding the transmission range. Safety instructions for standard/rechargeable batteries • Caution: Risk of explosion if you use or replace a battery by an incorrect type. • Do not short-circuit a cell or battery. • Do not expose cells or batteries to heat or fire. Avoid storage in sunlight. • Do not subject cells or batteries to mechanical shock. • Do not touch leaking/defective batteries unprotected. • Observe correct polarity. • Do not use different battery types. • Charge rechargeable batteries at ambient temperatures between +10 °C and +40 °C (+50 °F and +104 °F). 4 | Tourguide 2020-D