This cordless telephone set earned The Best rating from the Hammacher Schlemmer Institute because it produced the clearest conversations and had the greatest range. The Best model’s DECT 6.0 technology maintained a reliable connection up to 248' away from the base station and provided crystal clear conversations by reducing background noise and amplifying voices. It was the easiest to set up and each handset’s backlit LED display and large buttons enabled simple dialing. A call block button on each handset instantly blocks telemarketers and robocalls at any point during a call and stores up to 2,000 nuisance numbers in memory (comes with 14,000 pre-blocked numbers). With battery back-up that maintains calling functions during a power outage, answering machine, and audible caller ID (subscription required). Base unit supports up to six handsets (four included). 6" W x 6" H x 4 3/4" D. (11/4 lbs.)