This is an indoor antenna for terrestrial digital TV. I bought it for emergencies, but I no longer need it because I installed an outdoor antenna, so I'm selling it. My area is a bit far from the broadcasting tower, and the direction of my windows wasn't good either, so I could barely receive NHK. For reference. I recommend buying this only if you want to try it as a last resort. The following is extracted from the Amazon description: Vikisda Indoor Antenna, Digital Terrestrial Antenna, 500KM Reception Range, 4K High Definition, Flat Design with Signal Amplifier, Thin and Lightweight, 360-degree Omnidirectional Reception Antenna, High Performance, High Sensitivity, Easy Installation, Free Viewing, USB Type, Thin, Small and Lightweight, Compatible with UHF/VHF All Types, Japanese Instruction Manual Included Antenna TV Brand: Vikisda Color: White Impedance: 75 ohms Maximum Range: 500000 meters Product Dimensions: 33.8 length x 23.6 width x 0.6 height cm [4K High Definition Picture Quality & Free Viewing] Built-in high-definition antenna, equipped with a smart IC chip. With 1080P pixels and an improved 4K antenna, you can enjoy clear picture quality without noise and vivid colors. You can watch your favorite TV programs for free by using the signal boost TV antenna. [Excellent Signal Reception] The connector of this product has passed a 24-hour salt spray test and has strong antioxidant properties, and uses a high-performance pure copper cable. Smooth signal reception, covering a distance of up to 500KM depending on the region, and with 360° omnidirectional radio waves, signal strength can be ensured. Install it in a place where it is easy to receive household radio waves, such as a window or wall. [Lightweight, Ultra-Thin & Portable Easy Setup] The HD indoor antenna has an ultra-thin and lightweight design. It doesn't take up much space. With a coaxial cable of up to 5M, it can be installed anywhere in the room. With a stable flush mount design, double-sided tape is attached to the inside, so it can be easily attached to windows, tables, walls, etc. Just plug in the USB power cord of the amplifier and connect the terrestrial digital antenna to the TV, and it's ready to use. After installing it in a place where it is easy to receive radio waves, it's easy to set up by going to Settings → Connection → 3 channels. You can hang it on the wall with screws or stick it to the wall with double-sided tape.