With the AT&T DL72319 DECT 6.0 Expandable Cordless Phone featuring Bluetooth Connect to Cell and Smart Call Blocker, you won't 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 through—even the first time. You can also permanently blacklist any number you want with one touch. Bluetooth Connect to Cell technology on the AT&T DL72319 DECT 6.0 Expandable Cordless Phone 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. Easily add accessory handsets—up to 5 total—with just one phone jack.?The product voltage arrange is 110V