The night vision goggles have 7 levels of brightness. The brightness can be adjusted according to your needs. No infrared rays present the most realistic scene during the day, allowing you to observe the scenery from an infinite distance. If the light is insufficient or used in the evening, turning on the IR by pressing the IR Button. The night will be a black and white scene, with invisible infrared beams that will be used for more concealed monitoring. Viewing Distance in all dark: 300M/984FT. The water-resistant grade of the night vision binocular is IP54. Download Files to PC. By inserting the memory card into a card reader, you can connect the night vision goggles to PC through USB 2.0 cable to keep precious images/videos to avoid loss. Turn the wheel manually according to the actual viewing distance to adjust the best focus. If the observation distance is far, please rotate the lens to left, and rotate the lens to right to focus closer goals. If during the day, please make sure the IR is off (if IR is on, screen is black and white, or the screen is colored). Please adjust the focus by turning the Focus wheel slowly, until the screen is clear. Don’t be too close to the observation object. Recommend that the observation distance is more than 3m. Formating the Micro SD card that can improve the compatibility of Micro SD card. IR level can be up to 7 levels when the battery power is full. To prevent from damaging the electronics, don’t use any cleaning fluid.