One thing for sure, they are built like tanks, with the intended use in construction and mining sites, stores, and Industries. UHF is great for both indoor and outdoor use (in a city environment), especially when used indoors as they can pass through walls much better than it's VHF counterparts. All radios are functional and can talk to each other. All radios have their own holster with functional belt clip.
One of the radios has a bad speaker in the unit (the one shown with the external mic). The unit works fine with its external mic plugged in, though. Note that the cable on the external speaker is brittle and starting to come apart. You can easily find a replacement speaker online or just tape the wire of this one and live with it as it functions as intended.
Some have had their antenna rubber cover re-glued, which does not affect functionality. In the same way, one unit is missing the antenna rubber cover, again, not something that affects functionality, only the visual of it. Each radio has a battery inside, and I'm sending an extra one. I do not guarantee the functionality or life of any of the batteries.In one of the pictures, you can see all the radios powered up. Due to age, the batteries can quit working unexpectedly, so far for my use they have been fine, I did not test how long they hold charge, they lasted long enough all the times I have used them. Again, NOT GUARANTEEING BATTERY LIFE OR THE CAPABILITY OF THOSE TO STILL HOLD CHARGE. Both charging bases and power supplies charge the radios just fine. No further testing was done, or anything else has been noticed besides what I have described here, but keep in mind that those radios are used so they are not in immaculate conditions, expect that the rubber parts are brittle due to age, so rubber caps covering up the speaker port might be missing or broken off.