Yealink T53 is a basic VoIP phone for everyday users. T53 features wideband HD Voice audio from the hearing aid compatible handset and full-duplex speakerphone with echo cancellation. Yealink Acoustic Shield technology makes a virtual shield around the speaker and intelligently blocks sound outside the shield, thus greatly reducing background noise. It has a large backlit monochrome display that clearly shows letters for easy reading. The screen is adjustable, so you can position it for your height. T53 supports 12 lines, as well as 3-way audio conferencing.