Clarity AlertMaster AL12 Product # 52512.000 Brand New Includes One Year Warranty The Clarity AL12 AlertMaster Visual Notification System is designed to be used with the AL10 or AL11 Base Units, extending the range of either system. The Clarity AL12 has optional accessories that can alert you to an audio alarm, a crying baby or the presence of an intruder. The Clarity AL12 feature distinct flashing patterns and lighted icons on unit help you distinguish between the telephone and the doorbell. The Clarity AL12 is an ideal solution for those with a moderate-to-severe hearing loss who wish to have visual notification. AL12 Features AlertMaster AL12 Visual Alert System Designed For People w/ Severe Hearing Loss Accessories Available Customize the System to Your Specific Needs Flashing Patterns Lighted Icons Identify Each Event In The Household As It Is Happening Plug Play Battery Back-Up Compatible w/ Existing / Previous AlertMaster Base Units