If you're a senior or buying for an elderly loved one, the VTech SN5107 Amplified Accessory Handset makes it easy to add another phone anywhere in your home. This extra cordless handset works with your existing SN5127 or SN5147 senior phone system and gives you big, easy-to-press buttons, a large bright display, and helpful amplification that can boost incoming sound by up to 50dB at the touch of a button. The flashing visual ringer, full-duplex speakerphone, and spoken Caller ID announce help you hear and see calls clearly, while the simple design reduces frustration and keeps you confidently connected to family and friends.