ANTOP Technology: An exclusive technology offered by ANTOP, the High Gain inline Smartpass Amplifier’s all-in-one design, allows you an easier connection and more possibilities in different receiving ranges. You don’t have to hesitate any more on deciding between a short range and long range antenna! ANTOP’s Smartpass Amplifier delivers the correct range for you. ANTOP was the first antenna manufacturer to include a built in 4G LTE filter. This filter will block all 3G and 4G signals from mobile phones, tablets, wireless networks or mobile phone transmitters to ensure your noise-free digital TV reception. \r\nNotification： - Re-scan the channels after each switching of the Smartpass Amplifier. - Scan channels monthly to find all available channels including newly added or changed. - Do not place or hide the antenna in/behind any metallic objects. - Install the antenna as high as possible and near a window for better reception. - Keep the antenna away from any high power consumption devices to avoid interference. \r\n Product Information/Features Range: 35 to 50 miles from point of signal origination Power Supply: DC 5V Reception Pattern: Omnidirectional Polarization: Horizontal / Vertical Color: Piano White Size: 9.25x12.60x0.02in Coaxial Cable: 10ft Integrated Exclusive Technology: Smartpass Amplifier, Built in 4G LTE Filter Smart Switch On: Long range reception Smart Switch Off: Short range reception What’s in the box AT-133B PAPER THIN Smartpass Amplified Digital Indoor Antenna AC/DC Power Adapter USB Cable Stand Double Sided Suction Cup Double Sided Sticker 10ft Coaxial Cable  Instruction/User Manual