Vikeri Low Noise HDTV Indoor Digital TV Antenna Booster Signal Amplifier for Indoor Antenna with USB Power Supply Cable and Coaxial Cable This hd tv antenna amplifier is designed to pair with your indoor antenna, it allows you to boost the weakening signals because of the obstructions or distance between you and the local broadcast tower, well boost any non-amplified tv antenna, the attached directions will make you worry-free for the installation The signal booster is your best friend when you cannot enjoy crisp and clear program from your digital HDTV, or when you get poor channels reception from local station NOTE: this signal amplifier can strengthen the signals, improve the picture or sound when you had a weak signal. We do not suggest you use this digital signal booster if your house is very close to the broadcast tower, the existing signal is very strong Channel reception will vary depending on the TV antenna, how far away you are from broadcast tower, obstructions between your home and the local broadcast tower, and what is being broadcast in your area We do offer 12-month warranty, 30 days returns and money-back guarantee for quality-related issues