The sound quality on cordless phones can be really poor so boost your hearing with this award winning amplified dect phone you can adjust both incoming speech and ringer volumes to your own chosen level 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 a whopping 80db almost the level of most sirens and burglar alarms it also has a speakerphone function with 5 volume levels and i