The Panasonic KX-TG4012N is an expandable cordless phone system. It uses DECT 6.0 technology to offer improved error correction and transmission and an extended phone range. This cordless phone system comes with 2 handsets and supports a max of 6 handsets. It has an operating range of 25" and the Eco mode reduces the handsets power consumption when its used close to the base unit. It delivers 13-hour talk time and 6-day standby time. The handset paging locator button on the base lets you locate the handset when it"s buried under the newspaper. 2 other useful features include handset-to-handset intercom and 4-way conference capabilities.