MS-4021B Digital Tire Pressure Gauge with 4 Valve Caps, 5-150psi (psi, bar, kPa, kg/cm2)

Arrived overnight as scheduled, packaged well. The product is just as described. Simple and easy to use, very accurate. For the price, definitely worth the money.

I am completely satisfied with this product. I purchased based on a consumer magazine recommendation. It works great, creates a quick and easy seal on the tire's valve and reads accurately. It's a good value for the money.

Purchased this in March of 2022. It is now May of 2023. Haven't used this too much, maybe ten times in the past year. Went to use the other day, and it gently dropped (less than a foot) onto the pavement. Did not work after this short drop. Thought that perhaps battery somehow shifted when it hit. Took off the battery cover, and removed the three (3) LR44 batteries. All three of the batteries had started leaking. SInce I didn't have any spares on hand, I cleaned them off and re-installed- gauge now works again. I'll be ordering some batteries. I have an old (over 20 year old) Accutire digital gauge that I carried on my motorcycle- bouncing around for over 80,000 miles- never stopped working, and still on original batteries. This new gauge and the old gauge read exactly the same pressure. I'm assuming they're both right. UPDATE NOVEMBER 2025: The batteries that I put in back in 2023 also leaked (see below) Pros: Has worked well since, no issues. I do like the fact that the display is backlit- it makes it much easier to read than my other gages. The angle of the head also makes it easy to reach the valve on my cars. Cons: The angled head makes it a little akward to use on my motorcycles, as I have to adjust the gage body to clear the brake rotors. I have compared this gage with my two other digital gages, they're all within 0.1 psi of each other, so I suppose they're all pretty accurate. I went to use gage in November of 2025 and batteries were dead. Opened up the unit and tthe (two year old) batteries had also started to corrode. Cleaned up the battery compartment and put in three new LR44 batteries and back in business. I would suggest checking the batteries at least once a year for corrosion and condition to minimize the chance of damage. I keep the gage in an old eyeglass case to protect it in my glove box. I am buying a few more of these as small gifts for my kids for Christmas this year.

Easy to use & accurate (at least mine was). Much easier than stick type gauge to get securely on tire stem. Fast, so I don't mind checking air pressure in the winter cold.

Works great, easy to use, quality product.

good product. works great

Very accurate and easy to use. Great for keeping tires inflation as needed.

This gauge is made of plastic but seems sturdy. I like that I can put the digital gauge on the tire stem and it automatically turns on and takes the pressure measurement. It seems accurate when compared to my tire inflator device that is digital.

El general facil de usar solo es preionar un boton y el chequeo. Llevo unos meses con el la pila sigue igual funcionando y se ve de buen calidad a precio accesible.

This gauge is durable, easy to use, and easy to keep handy in a glovebox or door pocket. Reads accurately when tested against a calibrated air gauge. Still running on the original battery after 3+ years of monthly use.

This fortunately reads psi. It reads the same as another gauge I have and agrees with the car's TPMS so all three must be correct. I have an old version of this gauge from probably 20 years ago and it still works on the original battery. It's very easy to use and is highly recommended.

Accurate as expected

Excelente producto. Se ve claro, es preciso. Solamente a veces la valvulares negra como que si se afloja y se debe de apretar antes de medir. Para que la medición sea correcta se debe de medir en frio. Entonces carga las llantas a 6 psi más de lo que indica el manual. De ahí ya lo dejas la noche y en la mañana antes de partir lo dejas. Manejar con las llantas bajas causa el mayor desgaste y que exploten en carretera.