Power and mute button are there. For putting it in a rack, I can a pair of 4 post rack mount kit.This doesn't solve the problem of no ears, but if you get creative or have some extra metal laying around you could fashion your own. I don't have this available to look at to see what mounting style it uses.
If that's a concern, let me know and I'll see if someone can check. NO BATTERY or BATTERY TRAY. Check my other listings for the other rack items I have for sale. The item "HP R5500 XR-NA/JPN 3U Rack mount UPS Single Phase 5000VA 4500W 326528-001" is in sale since Sunday, October 6, 2019.
This item is in the category "Computers/Tablets & Networking\Power Protection, Distribution\Uninterruptible Power Supplies". The seller is "treader32" and is located in Garner, North Carolina.
This item can be shipped to United States.