<p>✔ If you want to improve the signal of single digital HDTV antenna, moving it closer to a window or higher up on a wall might do the trick.</p><p>✔ The digital TV signal is a ‘line of sight’ signal. Typically, the higher you have your antenna, the better the reception. While signals pass through walls and other surfaces, the more obstructions the signal encounters, the weaker the signal and this causes signal disruption. The clearest, most unobstructed view to the broadcast towers will allow the antenna to perform at the highest level.</p><p>✔ The main disadvantage is that roofing materials may prevent the antenna from picking up channels clearly. Other factors like fluorescent lights and computers may also have a negative effect on your TV receiving a clear picture from the antenna.</p><p>✔ 360°design pulls in signal from all directions. If a signal cannot be received with the amplifier, remove the antenna amplifier and try again. You can flexible position for the optimal signal reception, especially for a TV sits distant from the window . </p><p>✔ The antenna can support 1080P, 720P and 4K,ASTC , and so on, but please don't put the antenna very nearly in Magnetic products, that is also interfere with signal and magnetic objects will deteriorate image quality, you should put the antenna far away from Magnetic products and put the antenna on the window, and facing the outside place.</p><p><br></p><p><b>Technical Specifications </b></p><p><br></p><p><i>Type: Indoor antenna</i></p><p><i>Brand Name: Changel</i></p><p><i>Frequency Range : VHF174-230/ UHF470-862Mhz</i></p><p><i>Gain : 5dB/25dB with amplifier</i></p><p><i>VSWR : 2.0</i></p><p><i>Polarization : vertical</i></p><p><i>Impedance : 75 ohms</i></p><p><i>Size : 60*148.5mm</i></p><p><i>Cable Length : 9.8 ft</i></p><p><i>Power supply : By setbox</i></p><p><i>Connector Type : F male or customized</i></p>