Dahua VTH5221DW-C - Screw; Steps

device in case of failure, and please contact after sales service.
4.2.1 Screw
Component Name
Diagram
Quantity
M4×30 cross pan head
machine screw
2
Chart 4-1
4.2.2 Steps
See Figure 4-2.
Figure 4-2
Step 1. Embed 86 box into wall.
Step 2. Fix installation bracket on 86 box with two M4×30 cross pan head machine screws.
Step 3. Fix device unit on installation unit with buckle.
Note:
During installation, the recommended distance from device center to ground is
1.4m~1.6m.