Middle switch: rubber waterproof switch, soft material, light touch to change the lighting mode; 5. Headlight belt: flexible light belt design, can adjust the appropriate size according to the size of your own head; 6. Red warning: the back of the battery compartment adopts the LED red warning light design, which is used when going out; 7. DC charging port: the rear charging port, connect to the power supply, it can only be charged quickly, and the battery life is prolonged; 8. Rear battery compartment: The rear rechargeable battery compartment is designed to install 1 or 2 18650 batteries