That's such a clever idea! It's a small device that screws onto your tire valve stem and changes color to indicate when your tire pressure is low, It's a great way to avoid costly tire damage and improve fuel efficiency, It's also easy to install and doesn't require any special tools, Plus, it adds a splash of color to your wheels.

Product Information:
Material: Plastic Alloy
Detection pressure range: car tires
Display mode: double explicit
Appearance: Mini
Color: silver

Packing
Plastic valve cap*4