This product is either discontinued or we cannot get that from suppliers.
Qnap 250W Power Supply Unit For PWR-PSU-250W-FS01, Power Capacity 250 Watt, Power Provided 250 Watt, Compatibility PC.
This 250W Power Supply Unit is designed for TVS-x82 and TVS-x82T NAS series, which includes the TVS-682, TVS-682T, TVS-882, TVS-882T, TVS-1282, and TVS-1282T.