Use this handset in conjunction with your AT&T phone system to create optimal phone communication within your office. The two-line feature lets you make multiple phone calls at once. You can store up to 6000 contacts in the phone book directory and connect your cell phone to ensure you can swap between cellular and office calls seamlessly as needed. A separate ringtone on this AT&T handset can be set to distinguish when you have a cell phone call coming in. Cordless expansion handset ideal for home and office usage. Download up to 6000 cellular phonebook entries into the cordless handsets. DECT 6. 0 connectivity interface provides unsurpassed range and clarity thanks to a unique antenna design and noise-filtering technology. High-contrast black text on the cordless handset makes it easy to read incoming caller ID or call history records, lighted handset keypad allows for easy dialing in low-light conditions. Features quick-access key for voicemail box, last 10-number redial, and any-key answer. LCD display for easy viewing, offers caller ID and call waiting to identify who is calling and avoid missing important calls. Contains one accessory handset. Comes black color. Handpick the mobile phone contacts you want to add to your system, this feature ensures you will always have the most important and most recent names and numbers on hand. High-contrast black text on the cordless handset makes it easy to read incoming caller ID or call history records; lighted handset keypad allows for easy dialing in low-light conditions. ECO mode manages power consumption so the system uses less energy and you get the best battery life. Program up to 200 names and associated phone numbers in the handset, quickly access the directory entries by scrolling alphabetically or entering the first letter of a name. Silence the ringer on the handset and base for just a moment or for an extended period of time. Accessory handset only, requires a TL86103 to operate. Use of caller ID, voicemail features requires a subscription from your telephone service provider. 1-year manufacturer limited warranty. Safety Data Sheet . Reduce the chances of missing an important call with this AT&T accessory handset.