With the AT&T DECT 6.0 Dual-Handset Cordless Telephone, you can keep two cordless phones in different parts of your home or office without having to worry about going out of the range. The CL81211 boasts unsurpassed range thanks to DECT 6.0 digital technology, allowing you to make calls in the basement, attic, or garage of your home with crystal clear, HD sound quality. The CL81211 features caller ID and call waiting, and allows you to use up to four handsets on a call. Use the push-to-talk intercom to instantly communicate between handsets. With an easy-to-read high contrast, backlit LCD display, the AT&T DECT 6.0 Dual-Handset Cordless Telephone provides simplicity and functionality in one great cordless phone set.