ways which ensure the tire pressure monitoring system will work continuously, and do not occupy the car cigarette lighter socket. When the tire pressure exceeds the set safety range or leakage,the corresponding tire position on the display pressure and alarm symbols flashinge, while the buzzer issued a continuous bi-bi-bi ... sound prompt; press any key Cancel the alarm tone, but the fault icon is still displayed. the monitor displays real-time pressure & temperature, it can be placed anywhere stably and you can easily read the data. There are 4 specifications to choose from. 1. Color screen - external 2. Color screen - built-in Weight: 200g/300g Colour: Black Material: ABS Quantity: 1pcs Packing list: 1 tire pressure monitor Only the above package contents are included, other products are not included. Note: Reflection of light and different monitors may cause the item's color to be slightly different from the actual item. Measurements allow +/- 1-3 cm.