AASTRA 4425 IP Vision (SIP) for MX-ONE User Guide - Manual (Page 128)

129 Dialog 4425 IP Vision
Installation
5 Mount the spacer (article no. SXK 106 2049/1) on the wall.
Wall screws (not supplied) Ø max 5mm.
6 Place screws according to measurements and mount the
phone.
Placing the phone
Do not expose your phone to direct sunlight for long periods. Keep
the phone away from excessive heat and moisture.
Cleaning
Clean your phone only with a soft, water dampened cloth. Using
soap or any other cleaning materials may discolor or damage the
phone.