When installing the battery, be sure to face down(The side with words is positive), Be sure to put the battery in the insulating plastic ring inside. This insulating plastic ring must not be thrown away, otherwise the metal short circuit between the battery and the lamp shell will cause the battery to discharge and heat, and it will be out of power. Some insulating sheets will be more than the battery The tube is a little higher, so that when it is screwed on, it will top up. The battery will not touch the spring and the light will not turn on, so you can cut the insulating sheet a little bit shorter, so that the light will light up normally.
In addition, the colorful lights integrate multiple colors into one, the outer shell is transparent, and the four colors change cyclically when it emits light. Don''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t mistake it for multiple colors.