The variation in price will depend primarily on the number of channels, the transmission frequency, security features and other calling features. At the high end are 900 MHz models that operate on 25 or more channels and offer a full spectrum of features. Pricing for wireless phone systems varies considerably depending on the type of system being considered. In general, a wireless phone system gets to be quite expensive. Features If you are serious about security, a digital spread spectrum phone with voice scrambling can prevent even a determined snoop from listening in on your conversation.
Many phones now have LCD displays that can display the phone number being dialed or the call length.
Some can even work with Caller ID to indicate the phone number of incoming calls. You can get cordless phones with multi-line capabilities at a slightly higher price. For those who hate dialing phone numbers, a fun feature to have is voice dialing. Another interesting option is a cordless phone with a headset jack so that you have the option to talk without having to use your hands.