The Panasonic KX-TG674SK DECT 6.0 Link2Cell Bluetooth Enabled Phone with answering system and 4 cordless handsets, allows you to link up to two cell or smart phones and integrate them into the phone system via Bluetooth. All of your contacts stored into your cell or smart phone can be shared with this phone system allowing you access to their phone numbers right from the handset. For those times when you're running late and cannot locate your cell or smart phone, there is a cellular locate mode conveniently on handsets and base that will guide you to your lost device. This model also features comfort design allowing for comfortable listening, shoulder grip and easy to hold design. Power back up and advanced TAD (telephone answering device) functions tie it all together making this system one of the most reliable and functional systems available in the market today.