Application:The Disposable Face Mask is for ordinary people, not for doctors, nurses and the staffs in hospital. all people should wear nonmedical face coverings when interactive with other during the coronavirus pandemic.
Variable gain amplifiers (VGAs) are used in a variety of remote sensing and communications equipment. Variable gain amplifiers deliver unmatched performance for signal chains that require high dynamic range.
Comfortable to wear no skin damage Has the function to stop dust, water, droplets entering the mask and isolate the filter layer. Three layers of protection Non-irritating to skin, Soft, Lightweight
Hand free fan was designed as a headphone to free your hands anywhere;Fashion style makes you look so cool and you can take it anywhere in hot weather.The lightweight cool necklace fan won't hurt your neck and you can hang it for long time.