The CA-CX uses a loud ringer and bright flasher to alert you to incoming landline, cell phone, Skype and FaceTime calls and text (SMS) messages. And with a bed shaker connected, you will never miss a call again, even while you sleep. Product Features: - Simple to use. Just plug into your landline or park your cell phone on the unit and set it to "vibrate". - Unique, bright flashing patterns and adjustable ring tones distinguish calls from landlines, cell phones and Skype. - Bright indicator lights alert you to a missed call or SMS message. - Detects and alerts you to WEA public emergency broadcast warnings of impending emergencies or disasters. (WEA - Wireless Emergency Alert - Check with your cell phone service provider to confirm they provide WEA alerts.) - Its USB Port serves as a convenient, dedicated charging station for your cell phone. - Jack for optional bed shaker so you'll never miss a call, even while you sleep. - Battery Backup in case of power outages (batteries not included). - One year manufacturer's limited warranty NOTE: Skype is a trademark of Skype and Serene Innovations, Inc. is not affiliated, authorized or otherwise associated by/with the Skype group of companies.