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Niceyan92
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need use 3*AAA battery, not include
How to use: Step 1 :Minimize light. A dark room will show the best results. Pre the button on the bottom of the device to turn on the infrared LED. Step 2 :Pre gently on the skin with hand preure and slowly move the device from one side to the other. Veins will appear as shadows or dark lines that will appear on the perhery of the device that glows red. Note: The device must be in contact with the skin when looking for veins. Taking light out of the skin will not show anything! Step 3 :Once the vein is found (dark shadows/lines), relocate the infrared light around this area to get the best visual acuity. If the vein is shallower to the surface, the light source may have to be moved further because it may be too bright and cover the vein. It is best to follow the vein path so that you have a complete visual size and direction. Note: It is best to find a vein that follows a straight road.
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