Home Signal Booster - Power Confirmed

Thank you for looking.
I used this at a site office in the mountains last year.

Please understand that this is a used item.

Manufacturer's Description Excerpt
[Automatic Signal Adjustment] This booster intelligently senses signal information and can adjust for maximum signal performance. Once the booster is installed, you won't have to worry about it anymore. No matter how the surrounding signal information changes, you won't need to readjust it.
[Important Purchase Note] This mobile phone booster can operate on bands 1, 6, 8, 9, 18, 19, and 28. It supports many carriers such as KDDI au, NTT Docomo, and Softbank. However, all mobile phone amplifiers can only operate on specific frequency bands. The amplifier can only boost your signal if your mobile phone's frequency band matches the amplifier's frequency band. Therefore, please test your mobile phone's frequency band before purchasing.
Frequencies: Band 28, Band 26, Band 8, Band 3, and Band 1. Band 28 Uplink: 703-733MHz, Downlink: 758-788MHz. Band 26 Uplink: 814-849MHz, Downlink: 859-894MHz. Band 8 Uplink: 890-915MHz, Downlink: 935-960MHz. Band 3 Uplink: 1710-1785MHz, Downlink: 1805-1880MHz. Band 1 Uplink: 1920-1980MHz, Downlink: 2110-2170MHz.