[. . . ] Place the aerial on or near to the TV and/or radio and/or set top box (DTT receiver). [. . . ] For caravan or boat use: Plug-in a fitting DC connector from a universal car/vehicle (cigarette lighter) adapter, e. Operation In order to get the best possible picture and sound, please proceed as follows: 1. VHF/FM analogue reception: Select a VHF TV channel on your TV or a FM audio channel on your radio and try various angles and lengths of the telescopic VHF Antennas until you get the best reception. UHF analogue reception: Select an UHF TV channel on your TV or a DAB FM audio channel on your radio and try various rotation angles and tilts of the ring UHF Antenna until you get the best reception. ­ Optimize sound and picture by turning the Gain Control of the amplifier. When snow or rolls appear on the TV screen the received signal might be too strong. [. . . ] In order to switch power off turn Gain Control & ON/OFF switch anti-clockwise to OFF. [. . . ]