Feature: 1. [Dual Light Source] This vein vascular viewer, with dual light source design (red and yellow light), LED chip, brighter than other ordinary viewers, more penetrating, blood vessels can be easily presented. 2. [Hand Grip Design] Ergonomic design, hand grip design, combined with the yellow light detection and red lighting hand grip two ways to use, both adults and kids' palms, one handed grip operating is convenient, labor saving and easy to carry, practical. 3. [Main Purpose] LED vein detector is used for palm, arm, leg, face vascular puncture assessment, directly displaying superficial skin vessels, providing a clearer view of veins. 4. [Applicable Scenes] LED vein light is compact and suitable for home, hospital, pediatric clinic, outpatient center, laboratory, nursing home and other places. 5. [Applicable People] Applicable to hand vein examination for people of all ages, suitable for infants and kids from 1 to 10 years old, obese people, edema people, cancer patients, normal people, etc. 6. [USB Charging] Built in polymer li battery, the endurance is up to 8 hours, high efficiency and energy saving, and equipped with USB connection cable, convenient for charging. Specification: Item Type: LED vein light Material: ABS and PC Weight: Approx. 233g / 8.2oz Product Size: Approx. 218x40x40mm / 8.6x1.6x1.6in Battery: Li polymer 3.7V 500mAh (built in) Light Source: Red and yellow light Light Level: Red lighting (low light, medium light, high light); yellow light (long light) Use: Vein finding Charging Method: USB Type C Control: Button. Package List: 1 x Vein Light1 x Instruction Manual1 x USB Cable Note: The detector needs to be used in a dimly lit environment. Stronger and brighter light will affect the effect of vein detection.Red lighting is mainly used to view veins in the palms of the hands, feet, and ears, and yellow light is mainly used to view thicker veins in the flat area, when using, let the light source close to the skin and in the dark environment effect is good.