DescriptionCertification : NONE4pcs 2.4 Bar Car Tire Pressure Alert Cap Detection Monitoring Valve With Wrench4pcs 2.4 Bar Car Tire Pressure Alert Cap Detection Monitoring Valve Warning Cap Tire Pressure Monitor Pressure Gauge Cap Feature:1.Real-time monitoring, know at a glance. Grasp the tire pressure in real time and know the tire pressure at a glance.2.The anti-theft nut design is added, which is more secure, and the tire pressure cap is not easy to be removed by others.3.Copper core/plastic core monitoring and early warning can effectively prevent tire leakage and pay attention to your driving safety. The copper core is more durable and has better anti-leakage performance. 4.Prevent air leakage, built-in seal. Built-in anti-leakage sealing ring with thread, waterproof and dustproof, prevent chronic tire leakage.5.The transparent window is clearly identifiable. The transparent PC cover makes it clear whether the tire pressure is abnormal at a glance. Specifications:Color:As picture Quantity:4pcs Size:As Picture Shows Material: PC+Metal Package Include:4pcs Car Tire Pressure Alert Cap With Wrench Note:1.Please allow 0.1-0.3cm differences due to manual measurement, thanks.2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same.