4in1 Auto Escape Rescue Tool - Life Saving Glass Hammer Window Breaker Life Saving Glass Hammer Window Breaker Auto Vehicle Survival Tool! Built In Seat Belt Cutter Provides Safety In An Emergency Be Ready For Auto Vehicle Survival With The Handy LED Flashlight Auto Power Off After 30 Seconds Of No Use Pressure Warning Preset Tire Pressure Alarm - Sounds an alert if your tire pressure is off more than +/-3 PSI from what you preset. With A Pressure Display Range: 0-100 PSI