This is truly a Swiss Army Knife that has many uses. I have used this many times. This is a digital tire gauge. My car has a TPM. However, when I'm pumping air, this tool is useful for showing the tire pressure instead of having to go back and forth to my dashboard to see the PSI numbers. Another plus is that it uses an AAA battery. The battery lasts a long time because this tire sensor does not consume much power. This tool has: 1. Flashlight. Its performance isn't the greatest, but it's perfectly adequate for searching for objects at night.2. window destroyer. The shard is hidden inside. The power window switch can be operated by pressing a button.3. Tire Tread Depth Gauge. Thanks for that. I don't have a dime to measure tire depth.4. A Swiss Army Knife is a knife, scissors, pliers and a screwdriver.