·Usagetouch the surface of the lamp to turn it on·USB power cable·Material : Acrylic·Weight: 425 g·Power:0.5 w·Input voltage:DC 5 V ·Battery：5 V 700 m Ah ·Color: Yellow·Size: 140 mm* 140 mm* 170 mm·Charge time and use time : 5 h/15 h·Average life hours：10000 h·Package1 x Lamp1 x USB power cableEnergy saving and environmentally friendly， satisfy all your expectations about a lamp.Great gifts for children and let it accompany them at nights.