HomeMatic HmIP-HAP-UK Mounting Instruction And Operating Manual page 5

Device overview
Front
A
(A) System button and LED
Back
B
D
(B)
QR code and device number (SGTIN)
(C)
Screw holes
(D)
Interface: Network cable
(E)
Interface: Plug-in mains adapter
Function and device overview
C
E
5