The dual function, SOLAS PML is designed with a chemical and electronic light source for additional protection. Personnel Marker Light (PML) green chemical light stick with a metal clip for attaching to clothing, lifejackets, or personal flotation devices To activate, squeeze plastic covering - housing will break off. Light stick will then be automatically activated Provides up to eight hours of 360-degree illumination Can be seen up to a nautical mile away on land, and up to three miles by air Meets U.S. Coast Guard requirements for Approval Series number 161.012/2/1 Waterproof, non-toxic, flame resistant Made in USA Dual PML available for both warm and cold water applications