Manual Activation; Twist On/ Off Manual Activation Boasts 45 Lumen LED; Strobe Light; 120 Hours Operational Life; 1.38 Inch Width x 1.2 Inch Depth x 5.56 Inch Height; Waterproof Up To 1 Meter For 24 Hours; USCG/ SOLAS/ CE/ Transport Canada Certified; Works With 2 AA Batteries(Sold Separately); Bulk