With the VTech IS8121 Expandable Cordless Phone featuring, Super Long Range, Bluetooth Connect to Cell and Smart Call Blocker, you wont have to worry about unwanted calls waking you up in the middle of the night or tying up the line. Robocalls are automatically blocked from ever ringing througheven the first time. You can also permanently blacklist any number you want with one touch. With up to 2300 feet or range, you can be on a call anywhere in your home, yard, or even your neighbors home. Bluetooth Connect to Cell technology on this cordless phone system lets you receive cell and/or landline calls from one home phone system. With a touch of a button, enjoy the high-tech benefits your smart phone offers. Even if your smart phone is in a different room, you can still access Siri or Google Now from the cordless handsets. Place a call, write or read a text and perform all the other actions these services offer.