2N Helios IP Verso v1.1 - Manual (Page 102)

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2N TELEKOMUNIKACE a.s., www.2n.cz
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3.5 Maintenance
If used frequenly, the device surface, the keypad in particular, gets dirty. Use a piece
of soft cloth moistened with clean water to clean the device.
Do not use aggressive detergents (such as abrasives or strong disinfectants).
Prevent water from getting inside the intercom.
Clean the device in dry weather so that waste water can evaporate quickly.