Engineered with advanced technology, BT 8600 Quad Cordless Phone With Call Blocker and Answering Machine gives you complete control over your incoming calls. This is designed to block 100 percent of all nuisance calls, up to 1,000 numbers. The BT Quad is hands-free, with a speaker, and has a 1.8 inch colour screen with an answering machine that can record 60 minutes of message.