1. Jumper connection for selecting the partition
2. Key for displaying the signal strength
3. Screw terminal block for 12 V connection
4. Potentiometer
5. Connector for internal piezo signaller
6. Wireless reception module
7. LEDs
8. Upper fixing hole
9. Cable feed openings
10. Fastening holes
11. Connection cable for piezo signaller
12. Piezo signaller
Fig. 2: Interior view
37