Olympia OL 2461 2.4 GHz DSS Cordless Phone with Dual Handsets and Caller ID (Silver) 2.4 GHz DSS signal; expandable to 4 handsets, 2 handsets included Supports caller ID with call waiting, 20-number memory 3-line backlit LCD with multi-language options Simultaneous intercom calls between handsets and 3-way conferencing Handset display-and-dial; selectable ring tones