Focus on R&D Stable and reliable
5.1 Don’t use this extension in the following scenarios because of interference
to electronic or medical devices:
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Hospitals, around people carrying pacemakers, and near other medical devices.
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Flammable and explosive places such as gas stations (flammable gas, dust,
metal powder, granular powder and other environments).
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On airplane (and near other electronics that are easily interfered).
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Any other occasions posted with restrictions or warnings about radio equipment.
5.2 Do not do the following violation operation on the call extension:
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Do not apply other than the specified voltage on the power supply of the call
extension.
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Do not disassemble or modify the call extension.
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Do not dip the extension in the water.
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Do not hit or throw the extension.
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Do not burn or heat the extension.
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Do not charge the battery against reverse polarity.
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Do not weld directly on the battery.
5.3 Other precautions:
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Do not place the call extension in direct sunlight or near the heater.
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Do not turn on extension near the TV or radio.
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Do not modify the battery at will.
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Please charge with the specified charger.
5. Warning
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