This Midland Weather Alert Radio with Silent Call Light and Bed Shaker is designed for those with hearing impairments and also for the blind and or deaf. The flashing strobe light and the bed shaker are included. It gives alerts,both visual and audible to hazardous weather conditions at all times. It uses Specific Alert Message Encoding (SAME) technology. Has 7 National Oceanic and Atmospheric Association (NOAA) channels. Public Alert certified. Selectable warning system. Voice, siren, and tone alerts. Has a battery backup but batteries are not included.