... 4.5V 200MAUSB DCThe lamp button:4 LED at the same time semi bright - full light - offBattery a:Adjustable clamp to clamp ... , belt can turn lamps function, the red light that charging intoLine, the green light that charging is complete, full of powerFor products ... .The 3 charger parameters: 4.5V 500MA New design EBook reading lamp (GF-R-919E) (book reading lamp/led book reading lamp)