The Sony SPP-S2720 digital phone system offers super-high 2.4GHz spread spectrum frequency providing greater range and superior clarity. The SPP-S2720 supports up to 4 cordless handsets with no additonal phone lines required (additional SPP-H273 handsets not included). The center jog dial on the handset and base provides easy one finger operation to directory dialing and caller ID information stored in memory. The cordless handsets can be used as walkie talkies up to 600 feet (additional SPP-H273 handsets required not included). The EZ access button provides one touch access to any set of numbers up to 32 digits long. Use for calling cards, 10-10 numbers or any long number that will be frequently used. Lighted keypad and backlit LCD for easy use in the dark. Features: High Power Digital 2.4GHz Spread Spectrum Multi-Handset Capability (Up To 4 Handsets) Caller ID With Call Waiting With 70-Number Memory Center Jog Dial Control With 50-Number Dialing Directory Walkie Talkie Function EZ Access Button Three-Line Backlit LCD Lighted Keypad Headset Jack Integrated Belt Clip Visual Voice Mail Indicator Multi Language Caller ID Prompt (English/Spanish) Intercom Call Transfer New Call Indicator Memory Match Ringing Long-Life Battery