The Clarity XLC8 is an amplified phone with call waiting and caller ID uses DCP and 50+ decibels of intelligent amplification to make conversations louder and clearer. Its Hands-Free in the handset and base with speaker phone provides loud and clear conversations. Dual Power Battery Back up lets you make calls when the power is out.. It has Live Slow talk to slow down real time conversation and messages on answering machine.The Clarity XLC8HS is an extra handset for the XLC8 Cordless Phone. It features Patented Clarity Power technology and improves conversation by making words not only louder, but also clearer and easier to understand. With up to 50dB of amplification, the XLC8 cordless phone pairs up with up to two mobile devices so you can enjoy crystal-clear amplified calls without using a landline. Landline jack allows you to take calls from both mobile and landline if you wish.XLC8 + XLC8HS bundle features:- Amplified Cordless Phone- DECT 6.0 Technology- Bright Voicemail Indicator- Talking Caller ID- Expandable Up To 4 Handsets- Amplified Volume - Up To 50dB- Adjustable Ringer Volume Control- Hearing Aid Compatible- 2.5mm Headset Jack- 3.5mm Neckloop Jack- Amplified Ringer- Call Waiting- Bright Visual Ringer- High Contrast Caller ID Screen- Amplified Cordless Handset- Loud & Clear Speakerphone- Talking Caller ID- Amplification Range - Up To 50dB- High Contrast Caller ID Screen with Large Font- Pairs with Cellular Phones