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This is a flat indoor TV antenna with a built-in amplifier, sold for receiving free over-the-air channels in HD. It is meant to sit near a window or high on a wall and connect to a TV's coaxial input. Amplified indoor antennas like this one can pull in nearby stations well, but reception depends heavily on distance to transmitters and on what walls and hills sit in the way. Owners of budget amplified antennas often report that results vary a lot from one address to the next.
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Lowest price we've seen: $29.99 on Nov 11 at Walmart. Tracked across 1 store since Nov 11.
Ratings are middling, and the pattern in owner feedback on budget amplified antennas is that some buyers get many channels while others get few or none. Results track closely with distance to towers and where the antenna is placed.