a. Take the front cabinet's crew down, pull it out perpendicularly, according the sign "+" "-" to put in the batteries (2pcs "AA" size 1.5vot. batteries)
b. Put the front cabinet back on the back cabinet in position, tighten the screws gently. Your safety flasher now ready to work again.
Tie the flash-light on your belt, pocket, coat or other suitable place. Push the button to right or down-ward. The flash-light will light up a strong light immediately.
Dimensions: 4"L x 4"W x 1.25"T