With features that make calls easy to dial and hear, the VTech SN5107 Amplified Accessory Handset with Big Buttons and Display is a senior-friendly handset boasting big buttons, 50 dB audio assist and smart call blocker. Increase the volume of incoming sound by up to 50 decibels to make conversations easier to hear and understand on this amplified cordless phone. The extra-loud 90 dB ringer makes it easy to hear incoming calls throughout the home. Plus, a light on the top of the senior-friendly handset flashes when the telephone rings, signaling an incoming call.