The infrared vein detector transmits light and infrared mixed wavelength to the skin, and hemoglobin absorbs infrared light, so that the vein vessels on the back of the hand can be clearly displayed, so as to assist the medical staff to check the vein vessels suitable for puncture under the skin, and improve the success rate of vein puncture, which can be used in hospitals, clinics, and family transfusion with auxiliary use.   Note: Before using, please choose a relatively dark environment to avoid the engine effect due to too strong surrounding light; Place the instrument astigmatism area in a patient's palm or feet when using; (Avoid the eyes being exposed to instrument light source directly, otherwise it will cause eye discomfort, especially newborns and infants.) Turning off the power After using, and counter-clockwise power button to turn off. Working time no more than 120 seconds each time, otherwise it will reduce the loss of performance or reduce the life of the light source. Features: Material: ABS Power: 15W LED beads: four core *3 American Rep Built-in lithium battery: 7.4V 650MA Charger: 110-220V 50-60Hz Size: 190*24*35mm Package List: Main machine Charging adapter User's manual