1. 2.4G ISM Band (2400~2483MHz), Support Skype 2. Commercial grade high quality speakerphone with digital echo cancellation 3. Large graphic LCD with blue color backlight 4. Multi-language caller ID display feature 5. Review Skype contacts and call list on handset LCD 6. Both base and handset ring for all incoming calls. 7. Auto-select RF channel to improve the quality of voice 8. Radio range: 15 meters(48feet) OR 50 meters(160feet) 9. Standby time: over 100 hours;Talk time: over 10 hours 10. Driver and soud card built-in, no driver and sound card required