Three Handset Cordless Telephone with Answering Machine and Large KeypadHear who's calling from across the room with Talking Caller ID announcements in English and Spanish from the base unit and cordless handsets; Frequency 1.9 GHzEasily block up to 250 telemarketers, robocallers and other unwanted numbers with one-touch dedicated Call Block buttons on base unit and handsetsSend clear, simultaneous announcements to every handset in the house, even when family members don't respond, with Panasonic Voice PagingOther conveniences include Full Duplex Speakerphone, Power Back-Up Operation, Headset Jack, Baby Monitor, Silent Mode, Noise Reduction and Intelligent eco ModeRefer user manual below.Trouble Shooting Guide Begins on PG 52 in the attached User Manual.