Does the frequency of the cordless phone is high or low?
Digital machines, of course, are better than analog machines, with little interference and clear speech.Pick a credible brand and buy it. There's no need to know so much.
The frequency is high, can use the shorter antenna, the antenna length and the wavelength are direct proportion, the frequency is low, the penetrability is better, but the antenna will be long. The frequency of indoor radio calls is higher now.
