FreeStyl1 - Extreme Range Single Line Cordless Telephone. Coverage: Up to 25,000 square feet, 10 acres and 6 floors of penetration Superior Multi Floor Coverage. Penetrates Concrete, Wood and Drywall. More Range than 2.4 or 5.8 Ghz. Outperforms all DECT solutions. Digital Spread Spectrum-Security. Expandable to (9) total handsets. Built in 2-Way Radio between handsets. Built in handset broadcast system. Base station dialing w/speakerphone. FCC Compliant Part 15 + Part 68. Wireless Intercom. Call transfer. 4-line backlit display. Any Key Answer. 2.5mm Headset Jack. Selectable Ring tones/vibrate mode. Key guard.