Indoor TV Antenna Specifications: Frequency range: 47-230MHz, 470-862MHz Receiving range: FM/VHF/UHF Gain: 28dB Output Level:100dBμV Impedance: 75Ω Power Supply: Via USB Power Adapter(5V/1A) Please Note: [Important] Antennas signal strength can vary depending on distance from the tower, terrain, and weather. Reposition the antenna in a different location if needed. It is best for the antenna to be in line of sight with the TV tower(s) and avoid obstructions. Always re-scan for channels after moving the antenna.