Dynamically monitor tire pressure, increase traffic safety. USB Out charging 5.1V 1A fast phone charge Colorful LCD Digital displaying, clear to show tire information Rear-time monitoring pressure & temperature of 4 tires Low air pressure/high temperature alarm Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. High Temperature/Leakage/Low Battery Alarm Intelligent Shock Boot when car moving, don't need to turn on/off Wireless connect by sensors, easy install Freescale chip sensors and fit on almost 98% cars on market More stable and accurate Anti High Temperate and Cold IP67 Protection/Waterproof Battery Life:2 Years, replaceable Working Temperature:-20-80 Easy to install, convenient to replace Type:External Sensor Colour:Black Material:Plastic Package Contents: 1 x Tire Pressure Monitoring System 4 x Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.