Motorola SD4581 2.4GH Cordless Phone & Handset 2.4 GHz digital FHSS signal; base speakerphone, dual keypads Expandable to 8 devices, 1 standard handset included Caller ID with visual call waiting, intercom, 50-name phone book Handset access to built-in answering system Supports optional wireless camera and cell phone modules and video-audio handsets