Clarity Professional C4220+ DECT 6.0 Amplified Cordless Phone with Talking Caller ID and Speakerphone 40 name/number call waiting/caller ID Concave earpiece design creates an acoustic chamber, "speaker phone" option. Bright visual ringer flashes to signal incoming calls plus a ringer volume adjustment control to increase the sound of the ringer. High-contrast LED screen is bright and easy to read. 4 tone settings provide a customized listening experience along with up to 50db amplification of the callers voice