Sensitive to sound,the light will slowly light up,the only elfs gallop in power,we have adopted a strong absortbance solar charging device,sunlight can be directly charged,need not be connected plug to rechargebr br Material:Imported solar charging silicon + thicker frosted glassbr Dimensions:height 16.5 X width 10cmbr Battery:800MAbr Weight:720gbr br China supplier:br Email : fangzhengcn@hotmail.