This is an RGBlue light module. It has been very useful for video and macro photography. It has been used underwater without any problems. Please note that a separately sold dedicated battery module is required for use. Condensing Lens This lens narrows the beam angle from 100° to 60°, increasing the illuminance. The dual structure of the optical lens and diffusion layer provides a flat light distribution without color unevenness. Filter connection is not possible. - Light module body - Condensing lens - Spare O-ring & dedicated grease These are the three items included. Please note that battery modules, etc., are not included. 〈Search terms〉 #RGBlue / #RGBlue / #UnderwaterLight / #Accessories / #UnderwaterLightParts / #LightModule / #Diving / #DivingLight / #Snorkeling / #LEDLight / #3000Lumens / #MarineSports / #NightDiving / #CaveDive / #UnderwaterPhotography / #MacroPhotography / #Wide