Powerful Red Hunting Light: ULTRAFIRE 501R uses the latest high-purity red LED chip with a wavelength of 620-630nm, providing excellent night vision effects. The bright and concentrated red beam of 200 meters helps you find prey in the distance without disturbing the animals. Stepless Dimming Red Light: Just turn the switch to customize the brightness setting in the range of 5%-100%. The brightness transition is smooth, and there is no longer a preset brightness limit. You can choose the appropriate brightness output according to different environmental requirements, or you can set a very low brightness to achieve a longer running time. Adjustable Focus & Single Mode: The head of the flashlight can be zoomed in and out to obtain zoomable light, and the telescopic focus design can adjust the far and near light. he wide-angle lens illuminates a large area when zoom in, the light can reach a distance of 200 meters when zoom out. Sturdy & Waterproof: Made of high quality aluminum alloy, matt anodized, resistant to scratches, abrasion and corrosion, and has IPX4 waterproof performance. The small size fits your pocket, backpack, life-saving bag or car glove box. Worry-Free: This product is a red-light flashlight set. If you have any questions, please feel free to contact us. Providing high-quality products and services to our customers is our top priority.