feature: Colour: color Size: 95x29mm 1. One of the most difficult parts of drawing blood can be finding the right vein. Some patients are difficult people; Their veins are either very small or very deep, making it difficult for health professionals to find the site quickly and easily. 2. Repeated acupuncture can cause pain to patients and may coloruce their confidence in their treatment capabilities. Phlebotomist performs stick operation. 3. While this device of ours can help you easily find veins in small clinics or facilities, even for collectors and Enthusiast, suitable for most people looking for veins with minimal stick. how to use: Step 1: Minimize light. A dark room will show the best results. Press the button on the bottom of the device to turn on the infracolor LED. Step 2: Gently press the skin with your hands and slowly move the device from side to side. Veins will appear as shadows or color lines on the periphery of the device that glows color. Note: The device must be in contact with the skin when searching for veins. Taking the light off the skin doesn't show anything Step 3: Once you find the vein (dark shadow/line), reposition the infracolor light around the area for optimal vision. If the vein is shallow from the surface, the light source may need to be moved further as it may be too bright and cover the vein. It's best to follow the path of the vein so you have full visual size and direction. NOTE: It is best to find veins that follow a straight path. Packaging contents: 1 flashlight