What about cordless phones?
Analog cordless telephone is the use of analog signal, digital cordless telephone is the use of digital signal, now mostly digital, equivalent to analog cordless phones, digital cordless phone function more, communication distance, strong penetrating ability, clearer call, strong anti-interference, high security, low power consumption, call standby time is longer, low radiation, environmental protection, health.Domestic recommended BBK, imported brands recommend SIEMENS.
General cordless phones will be more than 100, SIEMENS, Panasonic, a class of relatively good, also a few hundred dollars.Plug the phone into the machine and you'll be able to use itA single machine is a mobile phone like a phone, and the master slave is a single machine plus a landline. (when the phone calls, two can answer.)With batteries in it, you can charge it to the end of the block.