I am selling this item as I no longer need it due to a move. While I don't see any noticeable scratches, I would appreciate your understanding that this is a used item. --Quoted from the official website below-- This is a CS/BS-IF pre-amplifier booster compatible with 4K8K satellite broadcasts (3224MHz). It is used to amplify radio waves by inserting it in the antenna wiring when the TV signal is weak or when it is necessary to send the TV signal to multiple TVs. It operates on the power (DC15V) sent from the TV or tuner to the CS/BS antenna. It can be fixed to the wall with the screws included with the main unit, and can also be attached to the antenna mast using commercially available cable ties. Amplification band/gain: BS/CS 22/27dB.