Cell phone towers are also known as cell site or base stations, and are made up of radios, computerized switching equipment, and antennas for receiving and transmitting radio frequency (RF) signals. They are usually mounted atop or on the side of either tall buildings, water tanks, etc. They are usually built very tall, nearly 150-270 feet. Their antennas are generally located towards the higher end, so they can adequately cover the range of the entire area.
It couldnđ€™t be more familiar for us to use pen. Perhaps you have imagined that this common item may turn out to be unusual one day. Here is charming news for you: a pen with Video and voice recording function. Never miss it! The unique design of such kind of pen is listed as follows: