Tips: > 1.Re-scan the channels after each turning of the Smart Boost dial.> 2.Scan channels monthly to find all available channels including newly added or changed.> 3.Do not place or hide your antenna in/behind any metallic objects.> 4.Keep your antenna away from any high-power consumption devices to avoid interference. >> Product Information/ Features> Power Supply: DC 12V> Color: Black > Size: 4.60 x2.75 x0.98 in > Dual outputs, connects to more than one device> Enhances FM reception >> What’s in the box > SBS-602B HD Smart Boost Antenna Amplifier> AC/DC Power Adapter > Two 5ft Coaxial Cables > Two Wall Screws/Anchors> Instruction/User Manual >> Technical Specification > Frequency Range: 47-700MHz > Receiving Range: FM/VHF/UHF> Gain: 14dB Max > Adjusting Range: 0~10dB > Output level: 98dBuV > Impedance: 75O > Noise figure: =3dB > Return Loss: >8 > Power Supply: DC 12V > Power output: non > Insertion loss: non/>