⭐︎This is the main unit of GCU433D1S only. ※Power supply not included. CS/BS-IF/UHF Booster (33dB/43dB Dual Type) This single unit provides peace of mind regardless of the reception environment, from strong to weak electric fields. This is a dual booster that amplifies CS/BS-IF and UHF signals, supporting 4K8K satellite broadcasting (3224MHz), with a switch to change between 33dB and 43dB types. 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. This product has a high-shielding structure that is less susceptible to and less likely to be affected by radio waves such as Wi-Fi and mobile phones. Amplification Band: UHF 43dB (33dB), BS/CS 28/35dB. JEITA SH mark certified. For outdoor use. Thank you for viewing.