For Best PerformanceEnvironmentR Keep the product away from heating appliances and devices that generate electrical noise, such asfluorescent lamps, motors and televisions. These noise sources can interfere with the performance ofthe product.R Do not place the product in rooms where the temperature is less than 0 °C (32 °F) or greater than40 °C (104 °F).R Allow 10 cm (3–15/16 in) clearance around the product for proper ventilation.R Avoid environments with excessive smoke, dust, moisture, mechanical vibration, shock, or directsunlight.R The apparatus is designed to be installed and operated under controlled conditions of ambienttemperature and a relative humidity.Routine CareR Unplug the AC adaptor from the AC outlet and disconnect the Ethernet cable before cleaning.R Wipe the product with a soft cloth.R Do not clean the product with abrasive powder or with chemical agents such as benzine or thinner.R Do not use liquid cleaners or aerosol cleaners.Touch DisplayR Touch the display only with the end of your finger. Do not touch the display with sharp objects, such asa pen or your fingernails.R Use only one finger. Touching the display with more than one finger can result in unexpected behavior.PlacementR Do not place heavy objects on top of the product.R Care should be taken so that objects do not fall onto, and liquids are not spilled into, the product.Optional EquipmentR A KX-HDV20 (20 Key Expansion Module) can be used with the product.R The KX-HDV20 can be used only when the product receives power from the optional AC adaptor; itcannot be used when the product receives power via Power-over-Ethernet (PoE).R Up to 5 KX-HDV20 units can be connected to the product.However, if you mount the product on a wall, mount in with only one KX-HDV20 unit attached to theKX-HDV330. To mount a second KX-HDV20 unit or more, mount each in turn, unattached to the mainunit.9Important Information