All of the cabinets interior shelves are adjustable and hold a maximum weight of 25 pounds each. :DMAYBE JUST MAYBE FINIS has gotten all the problems fixed. One suggested improvement: Add a clip so that the user can keep them in place more easily. The original desk, and its replacement, both suffer from the same exact quality control issues. But here we are, blown away! Im still not 100% sure how to use or program the Quick Select buttons. The battery lasts, and the charging box lets you know when its time to plug it in with a clear percentage. I accidentally dragged them against an escalators glass and the finish on the side got like a burn on it. I know this is inexpensive, but the make is truly ridiculous, like a bad Chinese knock off or something! Which is which?Tried wiring all of the combinations but the electronics never came on.