SureFire R1 Lawman Rechargeable Variable Output 1000 Lumen LED Light White light output 1000 lumens on high O-ring and gasket sealed to keep out dust and moisture Three light levels: High 1,000 lumens, Medium 150 lumens, and Low 15 lumens Virtually indestructible LED emitter, microprocessor regulated to maximize output and runtime User-programmable tail cap and head switches provide three light output levels plus high-intensity tactical strobe Dual fuel capable: uses one lithium-ion rechargeable battery (included) or two disposable or rechargeable 123A cells Fuel gauge indicates remaining battery power