The loudest cordless phone weve ever found available as a money saving twin pack the handset receiving volume can be boosted to 50db the loudest currently available so you can always hear your caller clearly the ringer can be adjusted up to whopping 80db almost the level of most sos sirens both handsets also have a speakerphone function with 5 volume levels and are hearing aid compatible additional features include talking keypad and caller id useful if your sight isnt what it was an