1.working voltage:1~9V One piece of high efficient and constant current LED driver which set inside the buls enables the bulbs to be used in wide-ranging voltages and keeps the brightness going constantly. 2.LED power:1W 3.Long lifespan:>50,000hours 4.High intensity:>80LM 5.Lamp holder:standerised P13.5 or E10 6.Environmental friendly,energy saving,and shock resistant product.