Accessory handset only--requires the VTech SN5000 series phone to operate (sold separately) Big buttons and large display are easy to read when making calls Loud 90dB decibel ringer volume makes it easier for the elderly and hard of hearing individuals to hear when the phone is ringing Flashing light on the top of the handset flashes when the telephone rings, visually alerting your to incoming calls 50dB Audio Assist lets you turn up the volume on your conversations to make hearing and speaking easier Smart Call Blocker automatically blocks robocalls and allows you to permanently blacklist up to 1000 numbers with one touch Full duplex handset speakerphone allows you to talk on the phone hands-free Trilingual prompts accommodate those who speak English, French, or Spanish