1.Working voltage:1V~9V One piece of high efficient and constant LED driver which built in the bulbs to enable the bulbs to be used in wide-range voltages and keeps the brightness going constantly. 2.LED power:3W 3.Long life span:>50,000 hours 4.High intensity:>150LM LED brightness is higher than incandescence bulb's under the same power supply. 5.Lamp holder:standerised P13.5 6.Environmental friendly,energy saving,shock-resistance product.