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Product parameters: Working Frequency : VHF(172-240Mhz) \ UHF(470-860Mhz) VSWR : ≤1.5 Impedence : 75 Ω LNA Gain : 25dB Reception Range: 90miles Size:12.64 x 9.25 x 0.02 inches Cable : 1.5C-2V / Black L=4M Connectors : F Male Polarization : Linear Voltage : 5V Power Supply Connector : USB Current Consumption : 20mA Operation Temperature : -45 ~ 85℃ Compatible with :720p, 1080i, 1080p/ ATSC Product packaging includes: 1x HDTV Antenna with integrated 16 foot Coaxial Cable 1x Detachable Amplifier 1x USB power adapter with spare cable 1x Instruction manual 1x 3M Adhesive Mounting Stickers Tips: 1.Check to make sure you have correctly connected the hd antenna to tv. 2.Move the antenna,find a good signal receiving place without any obstacle and re-scan for channels. 3.You would better to keep the antenna away from the sources of interference, keep the antenna away from those big power consumption devices, such as air conditioner, elevator, hair dryer and microwave oven etc. 4.Don't rush to attach the antenna to the window glass or wall before finding the best signal location, because the 3M tape will lose its stickiness after repeated use.