The Panasonic KX-TGH72 digital cordless phone is an excellent mid-level model with great sound quality and a sleek, modern design. It also includes a number of additional features, including nuisance call blocking and enhanced volume for the hard of hearing.. Enhanced Volume for Clearer Conversations. Like all Panasonic cordless phones, the KX-TGH72 provides superb sound quality. It also includes enhanced volume functionality, making it up to 70% louder than standard Panasonic phones. This makes it ideal for the hard of hearing. The volume can be easily adjusted using the quick volume control button. The KX-TGH72 also comes with a full-duplex loudspeaker, so that calls are crystal clear even on handsfree mode.. Nuisance Call Blocking. The KX-TGH72 comes with built-in nuisance call blocking functionality, to help you cut down on the number of unwanted calls you receive. Thanks to a dedicated nuisance call block button, you can instantly block up to 1000 numbers with just a quick tap. It