The SL-1 is a 1 million candlepower blue lens weatherproof strobe light that is designed to get immediate attention for emergency phones or residences when used in conjunction with the SC-911 Strobe Controller. A strobe light can get help to you when you need it most, providing the emergency services with a clearly visible beacon to locate you as fast as possible, and also alerting people nearby and medical personnel of your need for assistance. Applications Use with Vikings SC-911 to visually indicate the location of a 911 call Use with any switched 12VDC source to add instant attention grabbing visual indication to any Viking product - Features Weatherproof design for outdoor use - Wall mountable with screws (included) - Flying lead connections for easy installation (wire nuts included) - SL1