This all-in-one system has everything you need to alert deaf hard of hearing people to the alarm clock, phone, or doorbell through their choice of flashing lights, audible sound, and/or vibration. The All-in-One LookOut? combines visual alerts and icons, audio tone and melodies, as well as a bed shaker to conveniently notify you of incoming phone/TDD rings, doorbell, and alarm clock alerts. Perfect for the hard-of-hearing and those who are heavy sleepers. Use all of the alert functions or customize to your preference. The best part? Set up is a breeze! Features Alerts you up to 5 ways ? through built-in LED lights, loud audible alarm, strong bed shaker, flashing words across the large display, and picture icons that light up when activated 90 dB alarm ? with adjustable volume and tone controls Large LED display Dual alarm lets you set 2 different wake times 5v/1A USB charging port for charging a smartphone or other device Bed shaker notification (can be turned ON or OFF) Dimmer ? Choose from auto or manual selection, between 3 selectable settings Bright flash notification (can be turned ON or OFF) Icon notification for up to 6 alerts Built-in calendar displays current month day 32 selectable melodies for audible alarms Battery back-up ? (3) ?C? size batteries Low battery indicator for transmitters 110/220v ensures your system will work not just in the US, but also abroad Includes (1) LookOut Receiver (1) Phone/VP Transmitter (1) Doorbell Transmitter with mounting kit (1) Bed Shaker Feature Details Brand Krown Mfg part # KNS360 Warranty 1 Year Manufacturer Warranty Color Black Weight (lbs) 1.95 Battery operated? Yes (batteries optional) Battery details (3) Type C Batteries System Krown LookOut Alert Type(s) Vibration Flashing Light Loud Audible Low Vision / Deaf-Blind Yes Yes Yes Yes Transmitter / Receiver Transmitter(s) and Receiver(s) Alert Trigger(s) Baby Cry Carbon Monoxide Mobile / Smartphone Doorbell / door knock Motion Pager / SOS Phone / VP Smoke / Fire Sound Severe Weather No No No Yes No No Yes No No No Expandable No Portable No Battery backup Yes USB charger Yes