Dell 4220 User Manual page 9

Ensure the projector operates between ambient temperatures (5 ºC to 35 ºC).
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Do not try to touch the ventilation outlet as it can become very hot after the
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projector has been turned on or immediately after it is turned off.
Do not look into the lens while the projector is on as it may cause injury to your
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eyes.
Do not place any objects near or in front of the projector or cover its lens while the
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projector is on as the heat may cause the object to melt or burn.
Do not use the wireless projector near cardiac pacemakers.
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Do not use the wireless projector near medical equipment.
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Do not use the wireless projector near microwave ovens.
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NOTE:
• Do not attempt to wall mount the projector yourself. It should be installed
by a qualified technician.
• Recommended Projector Ceiling Mount Kit (P/N: C3505). For more
information, see the Dell Support website at support.dell.com.
• For more information, see the Safety Information that shipped with your
projector.
• The 4220/4320 projector can only be used indoors.
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Your Dell Projector
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