... reader 1.ART NO:CY-D28 2.SPEC:Product name:LED computer light with dimmableReference:CY-D28Product size:15*3cmColor:silver-greyLED ... or rechargeable batteries,AC transformer,car power supply,the computer USB interface,laptop computer,HUB4.Three gears loses a adjustable switch ... needs to adjust the brightness of the different5.Small size,light weight,easy to carry6.Apply to laptop and desktop computers3 ...