4675831 2 35. Hang the machine onto the slot of the wall mounting board. Then lock the two bolts on the sides.Note: ● Installation method is different because of Hanging arm hardware's .●structureMust install the wall pendant on firm wall surface, please do not install this machine on ceiling or vehicles.Panel Control Keys91. Remote Receiving Sensor.2. Power Indicator.3. Power switch.4. SOURCE: Press this key to enter the menu of signal source and choose signal source.5. CH+/CH-: Press these two keys to choose channel, and adjust the options you need under OSD operation.6. VOL+/VOL-: Press these two keys to add or reduce volume, and adjust the analog value under OSD operation.7. MENU: Press this key to enter main menu.8. Power on/Standby .Note: There are some apparent differences between modes, please according to practicality.