This type of Nail lamp is designed for special art,it separate into A and B.(A ) ischargeable LED lamp. (B) is DC lamp with a tube. Certificate :CE and ROHS Is chargeable LED lamp,for exterior lighting,when you finishcharge it can last for one and a half hour Shell: ABS Voltage: 110-120V 220-240V Packing Size:59*47*33 24pcs Using Steps: Connect the lamp to electrical source,the indicate light eill be turn to red and the lamp begin to change.The lamp will finish charging when the indicate light turn to green (charge time will be around 5 hour ),Always remember to plug out after charging.The lamp will be turned on when opening LED cover to a certain angle,then adjust to suitable angle needed for lighting.(The lamp can be use for 2 hour continuous lighting after fully charged.)Close up the LED cover to turn off thr lamp,Please charge the lamp when the LED light is not bright enough.Try to make this lamp in charging when using, to get the lamp always prepared for contingencies.For any more information,pls feel free to contact us!