DX Antenna UHF Booster BU433D1 33dB/43dB Common Type Booster Only, Power Supply PSH20 Not Included This is the booster unit only, as I only needed the power supply. It has never been used. Although it is new and unused, there may be some minor scratches and box deformation due to home storage. Please purchase only if you understand this. Returns and refunds are not possible to prevent trouble. BU433D1 This single unit provides peace of mind regardless of your reception environment, from strong to weak electric fields. This is a dual booster that amplifies UHF, allowing you to switch between 33dB and 43dB gain with a single switch. It is used to strengthen radio waves when the TV signal is weak or when it is necessary to send the TV signal to multiple TVs. It is small and can be mounted on a horizontal mast. Amplification Band/Gain: UHF 43dB (33dB). JEITA DH710 mark certified. For outdoor use. All accessories are shown in the photos. Instant purchase is available.