Amazon has the Slime 20017 Digital Tire Gauge with Lighted Tip (5-150 PSI) as an Add-on Item for $5.40. Free Ship with Prime or $25 purchase.
Properly inflated tires improve gas mileage
LCD easy-to-read display
Auto shut-off for battery life extension and a reset button for quick multiple tire readings
Made with an ergonomic rubberized grip for comfort
Green translucent lighted tip and backlight for night use