Panasonic Cordless Telephone Handset KXTGDA63W pairs with the with KXTGD63x Series phones to grow your landline phone and meet the needs of your family especially if you work from home. Build a system of up to 6 handsets total sold separately and take advantage of features such as call blocking which makes it easy to blockup to 150 nuisance callers with the simple press of a button plus an audible Low Battery Alert to let you know when the battery needs charging and more. Noise Reduction Technology helps make every call as clear as possible by reducing the surrounding noise coming from the other party s telephone while a full range of handsfree phone functions lets you enjoy mobility and flexibilityfull duplex speakerphone lets you use your handset handsfree; handset can be used as a monitor for different areas of the house such as a baby s room even while away from home. Customize your caller ID to display in English or Spanish and get caller announcements in that same language so you can hear who is calling even when you re across the room caller ID require additional service through your local phone company.