The VTech DS 6151 Cordless Phone uses the DECT 6.0 Digital Technology that provides the best sound quality, security and range in cordless phones. The VTech Cordless Phone is expandable up to 12 handsets using a single phone jack. The 2-line expandable cordless phone allows individual voicemail boxes for each extension. This cordless phone with digital answering system comes in handy when you're not around to take your call. You can answer your calls using either the handset or the base speakerphone. In addition, this VTech cordless phone is hearing-aid compatible. You can make conference calls and look forward to interference-free, crystal clear conversations always with the VTech DS 6151 Cordless Phone.