This is a SUNON HA40101V4-000C-999 cooling fan, 40mm by 40mm by 10mm, runs on 12 volts DC and draws just 0.8 watts.

It's a 2-wire fan, so just power and ground—no tach output.

Condition is open box; it's been tested and works well, though there might be a few tiny scratches from handling.
No original packaging, but it's fully functional.
Unbranded?

Well, it's Sunon, so it's actually a quality brand, but the seller listed it as generic.
MPN doesn't apply, no UPC or EAN.

This little fan is perfect for electronics projects, 3D printer enclosures, small chassis cooling, or replacing a failed fan in some compact gear.

It's thin, quiet, and moves a decent amount of air for its size.

JST connector or bare leads?
Hard to say, but it's a standard 2-wire setup.

If you need a reliable 40mm fan and don't mind a couple cosmetic scuffs, this is a great budget pick.
Sunon makes good stuff—it'll run a long time.

Check your dimensions: 40x40x10mm, 12V.
Good to go.
