With the Panasonic KX-TG7624SK DECT 6.0 Plus, expandable, cordless phone you can move freely around your home while enjoying long range and amazingly clear sound. DECT 6.0 Technology provides voice encryption to protect you from eavesdropping and battery life feature for ultra convenience. This Panasonic phone system can support up to 6 handsets. Store the Caller ID info of any and all unwanted callers into your phone's Call Block list so that you can eliminate future pesky calls. With Link-to-Cell's Phonebook Transfer feature, you can transfer up to 600 names and numbers from your cell phone to the built-in handset directory via Bluetooth.