Strong Penetration: The light-emitting surface of the vascular imaging device is gently attached to the skin to clearly illuminate the blood vessels under the skin. It can be used iny bright environment. Safe light, no harm to the skin even if it is exposed for a long time. Lightweight: Our Vein Finder is small and powerful, measuring 4.3x1inch, You can take it everywhere in your pocket which is so convenient if you need it. Applies To: Vein finder provides a significant help for patients with vascular positioning difficulties, such as obesity, swollen tissue, hairy skin, dark skin,hypovolemia, etc. One Machine with Multiple Functions: The vein finder can be used on many parts of the body, including the face, arms, backs of hands, inner wrists, instep, etc., without limitation, which greatly increases the usability of the product.