[Main use] The LED varicose vein detector is used for blood vessel puncture evaluation, which directly displays the superficial blood vessels of the skin, and provides a clearer venous vision. [Applicable person] It is suitable for individuals or clinical patients such as blood drawing, blood transfusion, blood transfusion, venous blood transfusion, and venous cutting. It can be used to avoid pain of multiple puncture during veins when not found. It is used for clinic or family use. [LED Core] IV venous detector uses intravenous osmotic venous detectors using a fine -colored temperature LED light core. It is also equipped with a strong light penetration. It is also equipped with hemostatic band auxiliary rubber band, which has better matching effect. [High -efficiency and energy -saving single -handed, the single -key switch button is simple and fast. The built -in polymer lithium battery has a battery life of up to 8 hours. It is efficient and energy -saving. It is equipped with a USB data cable and is easy to charge. [Application] Gently the vein with both hands, and then slowly move the left and right to move the device. The vein appear in the form of shadows or black lines, and appear red around the equipment, glowing , making it easy to find containers that are difficult to trigger. Colour:black Material:plastic Package Contents: 1 x Vein Finder 1 x penetration 1 x usb cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.