[Main Use] The LED varicose vein detector is designed for facial blood vessel evaluation, providing a clear visualization of superficial blood vessels on the skin to assist in venous assessment. [Applicable Users] Suitable for individuals or clinical use involving blood collection, transfusion, or intravenous procedures. Helps reduce discomfort from repeated punctures when veins are difficult to locate. Ideal for use in clinics or home settings. [LED Core Technology] Utilizes a temperature-sensitive LED light source with enhanced light penetration to improve visibility of veins. Includes a tourniquet accessory for improved application efficiency. [Efficiency and Power] Features a one-touch switch for simple and quick operation. Built-in polymer lithium battery supports up to 8 hours of continuous use. Equipped with a USB charging cable for convenient recharging. [Application Method] Gently press the device against the skin and slowly move it left and right. Veins will appear as shadowed or dark lines, with surrounding red illumination highlighting vascular patterns for easier identification. Color: Black Material: Plastic Package Contents: 1 x Vein Finder, 1 x Tourniquet, 1 x USB Cable Note: Light reflection and screen differences may cause slight variations between the product color in images and the actual item. Measurement error allowance is +/- 1-3 cm.