This is the best little device I have bought for pumping bike tires! I bought an ebike about a month ago, so had to buy this electric tire pump to match the aesthetics! lol. Just kidding, as you know, bike tires lose air quicker than car tires. The device itself is so easy to use! You can preset the PSI for any type of tire. It'll remember the last tire type you used. Then, you just move the cursor over to the tire type you want before pumping it by pressing the power button again. It will automatically stop at your preset PSI. It's also very accurate at measuring your tire PSI. I tested it with my other measuring device. I have been using it for weeks, and the battery is still at full charge. And I use it almost every day. I don't know if it pumps car tires well, since I haven't used it that way yet. But overall a great product, so go out to buy it today if you need one to inflate your bike tires!