... a flashing and charging function can be used for emergency lighting, warning lights, small size, easy to carry. 2. Instruction ... the power switch, the button is the flash light and dimmer control switch( Adjustable brightness for 100%,75%,50%,25%), ... Application:1). Household emergency, 2). travelling and camping, 3). emergency lighting, 4). driving at night.4. standard Tube material: aluminum shell ...