With the AT&T DL72310 DECT 6. 0 three-handset expandable cordless phone, you won't have to worry about unwanted calls waking you up in the middle of the night or tying up the line. Cordless phone with caller ID/call waiting; can be placed on tabletop or mounted to a wall. 50-name/number phonebook directory, 50-name/number caller ID memory, and last 10-number redial. Volume control, intercommunication between handsets. Dimensions: 5. 63"H. Built-in voice message waiting indicators. Power source: rechargeable battery; talk time: up to up to 7 hours; standby time: up to up to 120 hours. DECT 6. 0 digital technology provides exceptional sound quality, security, and range; expandable up to five handsets. Answering system with up to 22 minutes of recording time to avoid missing important business messages. Bluetooth compatibility for easy smartphone use. Package include: one wall bracket, two power adapters, one power adapter, and one charging stand. Lighted keypad. 1-year manufacturer limited warranty. Safety Data Sheet.