Hear calls clearly on the Panasonic KX-TGM420EB phone. Volume Boost Control amplifies speech by up to 40 dB - that's 17 times louder than Panasonic's standard handsets. You won't miss incoming calls thanks to the loud ringer and bright red LEDs. Plus, Talking Caller ID can let you know if one of your contacts are ringing without even looking at the screen. Slow Talk mode makes it easier to understand fast-talking callers and voice messages. Simply press the button to slow down their talking speed by up to 20% without interfering with the flow of conversation.Good to know- The Tone Control button makes voices clearer - there are 5 different levels to choose from- Talking Dial reads out the name from the phone book or numbers as you press them on the keypad- This headset is compatible with ETS 300 381, so it works with most hearing aids- You can block numbers from a specific country or area code- Designed with accessibility in mind, the handset, display, and buttons are larger than standard cordless phones__________Please note: You must subscribe to a Caller Display service from your network provider for the nuisance call block and caller display features to work. Charges may apply.