SpecificationsGuard against unwanted calls easily with the KX-TGH723. It features Automated Call Block and a dedicated Nuisance Call Block button. Its digital answering system records for up to forty minutes, and it features enhanced volume for ease-of-hearing.Enhanced Volume and Quick Volume ControlThe receiver volume is up to 70% louder than standard Panasonic phones, with dedicated buttons for easy adjustment.Nuisance Call Block & Automated Call BlockClamp down on spam calls from telemarketers by blocking specific numbers, free phone number prefixes, or withheld numbers. And Automated Call Block plays a greeting and requires the caller to enter an access code, thereby disconnecting automated calls before the phone even rings.Do Not Disturb modeNot only can you put this phone on a silent Do Not Disturb setting, you can customise it so it rings for specific contacts. This means that your sleep will only be disturbed by loved ones or other special callers.Duplex speakerphoneTalk hands-free for added convenience, great for when you need to do something else at the same time, or include people around you in the call.Radiation-free Eco Mode PlusFree your home of potentially harmful radiation rays with the Eco Mode Plus. While the phone is on standby, it cuts transmitting power to zero. The base unit stays off until a call comes in or a handset is activated, keeping your home\'s atmosphere clean.Additional features:Dedicated Nuisance Call Block ButtonBaby MonitorMemory Dial Button on Handset