I・O DATA Recording TV Tuner REC-ON HVTR-BCTX3 REC-ON is a recording TV tuner that allows you to simultaneously watch and record programs from "terrestrial digital broadcasts," "BS digital broadcasts," and "110-degree CS digital broadcasts." Connect a hard disk (sold separately) to turn it into a recorder. It supports a maximum capacity of 8TB, so you can record as many programs as you like. Furthermore, by connecting to a network, you can enjoy TV programs, regardless of terrestrial digital, BS, or 110-degree CS, on your smartphone, tablet, or computer, both at home and remotely. You can freely enjoy TV anytime, anywhere, both for programs currently being broadcast and for recorded programs, transcending time and place. * A USB hard disk or NAS (network hard disk) (both sold separately) is required for recording. * A TV or computer display that can be connected via HDMI is required for initial setup. * To watch with the dedicated app, this product needs to be connected to a network with internet access. Operation confirmed. There are some minor scratches, but it has only been used a few times, so I will list it as almost unused. Please check the images for accessories and product condition.