Two Main Features:(Differet With Other Flashlights)   <1> Quick change LED pill system that enables the colour of LED to be changed easily from red, green, white or infrared without the use on any specialist tools. Link:    https://www.ebay.com/itm/124892374938      <2> Interchangeable torch head system that allows the head of the torch to be changed. Changing the head size alters the beam range LINK:  https://www.ebay.com/itm/124394640245 Dimensions: 33mm-->>Dimensions:215mm(Length)/41mm(Head)/25mm(Body)/28mm(Tail)      55mm-->>Diameter: 225 mm (Length) / 53 mm (Head) / 25 mm (Body) / 28 mm (Tail) 67mm--->>Dimensions: 245mm(Length)/70mm(Head)/25mm(Body)/28mm(Tail)   75mm -->>Dimension: 265mm(Length)/78mm(Head)/25mm(Body)/28mm(Tail) Weight: 38MM UF1508::234g(Without Battery) 55MM UF1508:296g(Without Battery)  67MM UF1508:422g(Without Battery)  75MM UF1508:482g(Without Battery)  The Perfect IR Illuminator for Your Night Vision Needs: Armasight Drone Pro Yukon Photon Pulsar N550/750 NiteSite NS50/200 Viper-Wolf Ward D vision DIY night vision -- UtilizingHigh Power IR 850nm(or 940nm) LED Emitter,The Smallest Infrared LEDs With More Than One Watt Of Optical Power. Rotary Focusing System: Illuminate Much Farther With Smaller Light Spot. Specifications: + Model: UF1508 IR Flashlight + LED Brand:IR 850NM/940NM LED or   Green/Red LED Chip + Material: Aircraft Aluminum Alloy + Battery: Support 1 x 3.7v 18650 or 2x 18650 Rechargeable Battery (Not Included)  + Range: 50-150 Meter+ + Lens: 38MM /50MM/67MM/75MM Aspherical Lens + Waterproof: Splash Proof Only + Dimension: 215mm(Length)/41mm(Head)/25mm(Body)/28mm(Tail) + Weight:234g(Without Battery) Package Included: By your choice