Check the listing for details. Waterproof 450nm Blue Laser Pointer Focusable Laser Module 450T-2000. Condition: New. Listed at 114.90 USD. Waterproof 450nm Blue Laser Pointer Torch Focusable Dot Spot Diving 450T-2000 ParametersModel: 450T-2000-F-W-XLLaser Shape:DotWavelength:450nmWorking Voltage:DC=3.7VStart voltage:2.5VWorking Voltage:3.7V @4.9ASpot Size:about 15-18mm at 5MOperating temperature:-10 ℃~ +60 ℃Beam pattern:Continuous line ShapeFocusable:YesWaterproof:YesFocusing method: Zoom by rotating the front threaded front coverDiving level: 5 meters divingElectric Control:ACCWarm-up time:NoneDimensions:φ33 * 135mmHousing Material:Aviation aluminumBattery:1x 18650 Lithium battery required（not included） Features The design adopts simple and fashionable style. The appearance and feel are quite good. The module is made of imported laser tube. The concentricity is high precision, the structure is close, the pressure assembling process is adopted. Design, and designed for waterproof structure, and can focus, tail switch for the long light switch.Our laser pointer is very powerful, so don't see it for long time with bare eyes.Please storage the laser in dry environment and keep it away from children.Please avoid direct eye exposure to the laser when use it as a pure laser pointer. Package1pc 450T-2000-FANG 450nm Laser Pointer (Battery not included for easy custom clearance)