SONY SPP-S2730 CID / Multi-Handset / Walkie Talkie Combo High power Digital Spread Spectrum for superior range and interference reduction Uses low interference 2.4GHz band Digital Spread Spectrum technology provides up to 100 times greater output than conventional 900 MHz systems Center Jog Dial(R) provides one finger access to 70 directory numbers and 50 Caller ID memories Digital Privacy applies sophisticated digital speech encoding