ITEM NAME:1 x Car Window Breaker,,5in1 Car Tire Air Pressure Gauge Window Breaker Cutter Descriptio n Description: monitor Measuring tire piezoelectric tube lifesaving treasure (HL-818C) Function Description: 1. The car measures the tire pressure when it is idle. 2. Press "ON" to turn it on, it will automatically reset to display "0.0". 3. Align the nozzle of the tire pressure gauge with the valve of the tire of the car and press it in (you need to remove the tire valve cap first) and do not leak, and keep it until it has a stable measurement value. 4. The measured value will remain for approximately 90 seconds and then the display will automatically turn off. 5. Long press (press and hold) "ON" button for 3 seconds to force shutdown. 6. This product has four unit modes of air pressure measurement: PSI (pounds per square inch, suitable for use in the United States) BAR (Bar, suitable for European use) KPa (KPa, suitable for use in Southeast Asian countries) KG/Cm2 (kg, suitable for China) Press the "ON" button repeatedly to switch. 7. Pull the slide switch to the appropriate position to turn on the LED light and flashlight. Specifications: Material: ABS + stainless steel Colour: Black Size: 16.2*3*6.5CM Operating temperature range: 30 to 122 degrees (0 to 50 degrees Celsius) Measuring range: 2 to 150 PSI Measurement error value: Â ±1 PSI Battery: :7#Battery*2 (not available) Package Included: 1*5-in-1 flashlight car tire pressure Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. 1 x Car Window Breaker,,5in1 Car Tire Air Pressure Gauge Window Breaker Cutter.Long press (press and hold) "ON" button for 3 seconds to force shutdown. Colour: Black. Press "ON" to turn it on, it will automatically reset to display "0.0". Press the "ON" button repeatedly to switch.