Are these using UPS or just directly on power? At our office, power goes off about once or twice a month when someone is working on the electrical system. We'v

Are these using UPS or just directly on power? At our office, power goes off about once or twice a month when someone is working on the electrical system. We've had lots of building work done, and it's definitely not been good on the Pi's - that being until we added UPS's.