Fangrui Product Details [main Use] The Led Varicose Vein Detector Is Used For Facial 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 Fusion, Blood Fusion, Venous Blood Fusion, 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