1byone OUS00-0566 is an Amplified Digital Indoor HDTV Antenna compatible with HDTV ATSC. It is easy-to-install and will give you years of enjoyment. It comes with a 16.5ft coaxial cable, external amplifier, 5ft USB power cable, optional USB adapter 5V 200mA, 3M adhesive mounting stickers, instruction manual and warranty card. This antenna can be connected to multiple HDTVs if using an amplified antenna. It is best to attach the amplifier in areas with weak signals and remove the amplifier if the signal is strong.