[Main Use] The LED varicose vein detector is designed for facial blood vessel evaluation, providing a clear visualization of superficial veins on the skin to assist in venous assessment. [Applicable Users] Suitable for individuals and clinical patients requiring blood collection, transfusion, or intravenous procedures. Helps reduce discomfort from repeated needle insertions when veins are difficult to locate. Ideal for use in clinics or at home. [LED Technology] Utilizes advanced LED light technology with temperature-sensitive illumination to enhance vein visibility. Features strong light penetration and includes an elastic tourniquet band for improved detection accuracy. [Efficiency and Power] Compact, single-handed design with a simple one-button operation. Built-in polymer lithium battery provides up to 8 hours of continuous use. Rechargeable via included USB cable for convenient and energy-efficient performance. [Usage Instructions] Gently press the device against the skin and slowly move it left and right. Veins will appear as dark lines or shadows, with surrounding areas illuminated to enhance contrast and make hard-to-see veins more visible. Color: Black Material: Plastic Package Contents: 1 x Vein Finder 1 x Tourniquet Band 1 x USB Cable Note: Light reflection and differences in display screens may cause slight variations between the product color in images and the actual item. Measurement error allowance is +/- 1-3 cm.