This product is designed to assist in locating superficial blood vessels and veins. It should be used in a dark environment away from direct light. Effectiveness may vary depending on individual characteristics such as skin tone or body composition. It is suitable for research or experimental use. Images are for illustrative purposes only. Product Features: Red LED light helps quickly locate veins in adults and infants The Vein Finder is a compact and af able red LED device that aids in visualizing veins under the skin Its slim, lightweight design makes it portable and convenient for various uses Emits a light frequency around 700nm, which is naturally absorbed by blood, enhancing the visibility of veins Equipped with 9 specialized wavelength LED beads Requires 3 AA batteries (not included) Allows visualization of veins that are not easily seen by the naked eye All products undergo strict quality inspections If you experience any quality issues or are not satisfied, please reach out for support We are committed to providing the best resolution