The Panasonic KX-TGC350B Expandable Cordless Phone System with Amber Backlit Display and Call Block works great in any home or home office. Includes one cordless handset in the phone's base unit, expandable up to six cordless handsets. If you're tired of getting interruptions from telemarketers or robot callers, this phone system has call block capability. With a Caller ID Service, the blocked number will be registered in the phone system's database. Additional features include: DECT 6.0 technology, Speed Dial, Call Waiting and Caller ID capability as well as Call Grouping on telephone's base unit and cordless handsets. This landline cordless phone comes equipped with many great features for the perfect home phone system. Guided feature tutorials are available for this cordless phone system on the manufacturer's website. DISCLAIMER: DECT 6.0 is a North American marketing term for DECT devices manufactured for the United States and Canada operating at 1.9 GHz.