Using titanium alloy and CNC carving technology, a very small key chain flashlight was made. In order to reduce the user's use cost, AAA batteries that can be bought at will are specially designed. In addition, for the convenience of users, the head is used as a switch, and a non-shedding structure is specially designed. A self-luminous light tube is added to the tail. In this way, you can find a flashlight freely in the dark.