Regulatory Notices
Operating Ambient Temperatures
• Operating temperature: +32 to 104°F (0 to 40°C)
• Relative humidity: 5% to 90%, noncondensing
• Storage temperature: -22 to +160°F (-30 to +70°C)
Warranty
Our product warranty is limited only to the unit itself, when used normally in accordance with the operating instructions
and the system environment. We are not liable for damage or loss resulting from the use of this product, or for any claim
from a third party. We are not liable for problems with Yealink device arising from the use of this product; we are not lia-
ble for nancial damages, lost prots, claims from third parties, etc., arising from the use of this product.
Explanation of the symbols
• DC symbol
is the DC voltage symbol.
• WEEE Warning symbol
T
o avoid the potential effects on the environment and human health as a result of the presence of hazardous
substances in electrical and electronic equipment, end users of electrical and electronic equipment should
understand the meaning of the crossed-out wheeled bin symbol. Do not dispose of WEEE as unsorted municipal
waste and have to collect such WEEE separately.
Restriction of Hazardous Substances Directive (RoHS)
This device complies with the requirements of the EU RoHS Directive. Statements of compliance can be obtained by
Safety Instructions
Save these instructions. Read these safety instructions before use!
General Requirements
• Before you install and use the device, read the safety instructions carefully and observe the situation during oper-
ation.
• During the process of storage, transportation, and operation, please always keep the device dry and clean, avoid
collision and crash.
• Please attempt not to dismantle the device by yourself. In case of any discrepancy, please contact the appointed
maintenance center for repair.
• Please refer to the relevant laws and statutes while using the device. Legal rights of others should be respected as
well.
Environmental Requirements
• Place the device at a well-ventilated place. Do not expose the device under direct sunlight.
• Keep the device dry and free of dusts.
• Do not place the device on or near any inammable or re-vulnerable object, such as rubber-made materials.
• Keep the device away from any heat source or bare re, such as a candle or an electric heater.
Operating Requirements
• Do not let a child operate the device without guidance.
• Do not let a child play with the device or any accessory in case of accidental swallowing.
• Please use the accessories provided or authorized by the manufacturer only.
• The power supply of the device shall meet the requirements of the input voltage of the device. Please use the pro-
vided surge protection power socket only.
• Before plugging or unplugging any cable, make sure that your hands are completely dry.
• Do not spill liquid of any kind on the product or use the equipment near water, for example, near a bathtub, wash-
bowl, kitchen sink, wet basement or near a swimming pool.
• During a thunderstorm, stop using the device and disconnect it from the power supply. Unplug the power plug and
the Asymmetric Digital Subscriber Line (ADSL) twisted pair (the radio frequency cable) to avoid lightning strike.
• If the device is left unused for a rather long time, disconnect it from the power supply and unplug the power plug.
• When there is smoke emitted from the device, or some abnormal noise or smell, disconnect the device from the
power supply, and unplug the power plug immediately.
• Contact the specied maintenance center for repair.
• Do not insert any object into equipment slots that is not part of the product or auxiliary product.
• Before connecting a cable, connect the grounding cable of the device rst. Do not disconnect the grounding cable
until you disconnect all other cables.
Battery Requirements
• Do not immerse the battery into water, which could short-circuit and damage the battery.
• Do not expose the battery to an open ame or leave the battery where it could be subjected to extremely high
temperatures, which could cause the battery to explode.
