- Model: UltraFire WF501B Cree R2    - Features a Cree XR-E R2-WC LED emitter    - Powered by 1 x 18650 or 2 x 3.0V/3.6V CR123A batteries    - Voltage input range: 3V~8.4V    - 5-mode tailcap clicky switch with state memory: Hi > Mid > Lo > Strobe > SOS    - Mode memory circuitry built-in -- returns the light to the previously used mode    - 250 lumens maximum brightness (manufacturer rated)    - 1000mA current output digitally regulated driver circuitry (manufacturer rated)    - 40 to 60 minutes estimated runtime?per charge?(manufacturer rated)    - Coated glass lens with aluminum textured/OP reflector<img src="http://112.74.112.28/down/products/415294/415294_000.jpg">