c14 Inch, illuminated dot-matrix LCD display with easy to use buttons and a well-spaced layout If you have Digital Voice or VOIP (Voice Over Internet Protocol), your phone service provider should be sending you a phone adapter. If you want to use your new phone service, you’ll need to plug this adapter into the back of your WiFi router, and the phone into the adapter. After Digital Voice switchover, your telephone sockets in your home won't work. Nuisance call blocker allows you to reduce unwanted calls when required, keeping personal time from being interrupted (Requires Caller ID subscription offered by your telephone provider) Enhanced receiver volume provides clear and audible sound that is up to twice as loud as standard phones, even when there’s background noise The modern and functional design blends into your comfortable and sophisticated life-style and the glossy surface finish complement’s the simple layout of the keys Shock Resistant tested to withstand drops from a height of up to 1.2 metres, so you can use the handset confidently knowing it will not break easily due to accidental drops.