NIPPON ANTENNA 4K8K Broadcast Compatible Power Detachable Booster Gain Switching Type NSB42DSUE-BP Brand new, unused item. This is a low-noise, high-output power detachable booster compatible with 4K/8K broadcasts (3.2GHz). The power supply unit is detachable, allowing for installation not only in the traditional antenna reception setup but also inside houses or information boxes. The UHF band (terrestrial digital) has a gain adjustment knob, as well as a 3-step (42, 32, 27dB) gain switching switch. The BS/110°CS band has a gain adjustment knob, as well as a 2-step (25/35, 15/25dB) gain switching switch. It has a power-passing switch for the BS/110°CS input side and the UHF input side. (※Factory setting is "off". Please refer to this for detailed instructions on how to use the switch.) You can check the power lamp without opening the case. Output monitor terminal included. Please check the manufacturer's website for other product details. ※Although it is a brand new, unused item, the package may have some scratches or dirt, so please refrain from purchasing if you are concerned about this. Thank you.