Beward DS03M Operation User's Manual page 5

Ventilation
To prevent overheating of the device, keep free air circulation in the area where the door
station is located.
Cleaning
Use a soft, dry cloth for cleaning door station's external surfaces. It is acceptable to use
some detergent for removing persistent dirt, but not the volatile cleaners such as the alcohol-
containing solvents, benzene and so on, because of the risk to damage the door station's housing.
IP Video Door Station DS03M(P) Operation User Manual
Chapter 1. Safety Instructions
4