In case of emergency, you can use your Auto Bail out device to break the window, remove the cap, press the trigger of firing pin against the window until it clicks. This is new mini multifunctional emergency tool. Use as a keyring and replace existing bulky life-saving hammer products. Includes a distress whistle and seat belt cutter the seat belt. Extremely reliable. The unique design of the striker allows it to have a very large explosive force, even when using underwater, window glass can also be crushed.To escape press the firing pin and push hard on the window glass to shatter and escape.