I am occasionally sent products for review, and some of them are really cool and innovative. I’m leaving out the units that turned out to be flimsy or not worthy of your time, but here are some I quite liked.

CoverSeal Car Cover. I now own three collector-class cars, with the purchase of a 2006 Saab 9-5 SportCombi station wagon with an ultra-rare stick shift. It replaces my Mercedes 300TE wagon, which was similarly forced to sit outside because my 1993 Saab 900 Turbo convertible and 1999 Mazda Miata (both also manuals) have pride of place in the two-car garage.

I bought a cover for the Benz, but it was always getting blown off by the hefty winds we have around my part of Connecticut. But now I’m using a CoverSeal ($305) that should defeat that problem. It has a 360-degree weighted bottom that allows it to stay in place even when the winds are at 40 mph. Forget about tying the cover down with bungee cords or trying to secure it with cinder blocks.

The cover is also designed to guard against rodent damage, which is something else I’ve experienced. My Saab 900 had its old dash wiring completely stripped away by the little rodents, despite several traps and alleged mouse-repelling products. The idea is that the mice “will travel around the cover, realize there is no entry point, and move on in search of a more convenient shelter.”

We’ll see long-term if these notably smart so-and-sos are deterred. The bottom edge of the cover sits on the ground, but that’s OK because the 10-mil tarp is waterproof and doesn’t mind communing with the earth. The covers are loose fitting, which allows them to be blown around by the wind, displacing pooling water. Because they’re loose, they don’t need the mirror pockets that can be annoying to fit. The only color is silver, because it reflects 90 percent of sunlight.

The cover, which comes with a carrying bag, is a bit pricey, starting at $305. But if it keeps out water and rodents—and doesn’t blow off—it should prove its worth. CoverSeal was designed by collector Ken Huening, who tried garlic oil, dryer sheets and peppermint spray to keep out the little beasts. Huening was nonetheless hit with rat damage twice, to the tune of $20,000—they didn’t care about my little bag of rat-repellent seeds, either.

Etenwolf Vortex S6 Tire Inflator/Air Compressor. I wouldn’t use it to paint a car, but the Vortex S6 (there’s also an S7 model) is very handy to have around. I just used it to inflate tires on two bicycles, an e-bike, a plethora of pool rafts and floats, and a Saab that’s been sitting around. The 15,600-milliamp-hour unit is easily adjustable between car, bike, inflatables. It can be used as a portable charger for electronics, though you may have smaller power banks for that.

The S6 is best if you prize portability. The S7 has more power, with a faster inflation time and a bigger battery. Got a truck with oversized tires? The S7 is best for that duty.

On the S6, the two included hoses (one detachable) covered all the use cases I needed. There’s a built-in 1,000-lumen LED light, and on-board storage for the tips you’d otherwise lose. The Etenwolf seems solidly constructed. There’s a 90-day guarantee.

This small, not heavy unit is much easier to use and more efficient than the portable compressor I bought at the hardware store. I see it for $89.99.

TOPDON TopScan OBD2 Scanner Bluetooth. Versions of this product have been around for a while, but now it is more capable, and marked down as low as $51.29 at Amazon. The unit does quite a lot, considering its tiny size (like a cigarette pack). Just plug it into the OBD2 port and, after easy 5.0 Bluetooth pairing, the car owner can send commands from his or her cellphone directly to the car’s ECU to track down pesky problems. It also provides guidance for fixing what ails the vehicle. For some of the premium features, you need a subscription, which is a bit pricey.

Obviously, the scanner can read fault codes that are otherwise mysterious, and it can clear them, too. It can also, a mind blower for me, access factory technical bulletins. And measure speed performance before it breaks into a sweat. There are multiple display modes for the data, including charts, dials and just the raw numbers. The software will get regular updates. The unit is compatible with Android and IOS.

Mothers California Gold Ceramic line. I’m not really the concours type—if you see a dusty classic driving past, it’s probably me. I like one-step processes. This set came in a big white bucket with three products in it: Ceramic Wash and Wax. Ceramic Paint Correction, and Ceramic Spray Wax, each $17.99. The sudsy wash & wax is very hydrophobic, which means that it results in a finish that beads water. It’s easy to use and good at getting a shine out of faded paint. The product simply sprays on and then gets carefully wiped out, leaving a long-lasting ceramic layer. I applied it to three cars: a 2014 Toyota Prius V, a 1999 Mazda Miata and a 1993 Saab 900 Turbo. The results were quite pleasing, with not a lot of elbow grease.

The paint correction product goes after small scratches and scrapes, water spots, swirling, and other minor flaws. I applied it by hand to the Prius V and KOed a lot of minor imperfections. Little pock marks that looked permanent whisked away. The spray wax is for aprés-wash. Again, it just sprays on and gets wiped off, leaving a shiny ceramic surface that beads water. The package also included yellow microfiber towels and a wash mitt that proved useful.

Fender x Teufel Rockster Air 2 Portable Bluetooth Speaker. Whoa, yes, this big Fender, offered in partnership with German company Teufel, is portable—it has three handles, doesn’t it? But the 31-pound unit is on the heavy side of what can be reasonably carried.

But all was forgiven when I hooked it up to both a CD player and the music on my phone. It’s got deep bass, crisp trebles and tons of volume. It runs on house current, 12-volt power supplies or for 58 hours on batteries.

The Fender x Teufel is incredibly versatile. You can attach a guitar through the instrument input and blow the neighbor’s minds. You can play phone music, or attach any old-school music-making component (CD player, turntable, cassette, eight-track player) through the quarter-inch aux stereo jack. Need a PA system? There’s a microphone input.

While the Fender x Teufel isn’t strictly a car product, it can run on your car’s 12-volt system and sit on the front seat with you. Or just use those long-life batteries. If you own a classic and don’t want to replace the tinny AM radio that came with it, this Fender can be used and leave no marks.