Automatic/ Manual Activation; Manual Deactivation; Automatically Activates For More Than 20 Hours When It Comes In Contact With Salt/ Fresh Water; LED Flashlight/ Strobe; 20 Hours Operational Life; Lithium Battery; 1.19 Inch Width x 1.13 Inch Depth x 2.44 Inch Height; Watertight Up to 3 Meter; USCG/ MED/ SOLAS Certified; Polycarbonate