Written 23 Aug 2026. Specs from maker pages and named street snaps. I haven't used this.
New $49 faster puck, not a used gigabit US-8: UniFi Flex Mini 2.5G
New $49 faster puck for a UniFi desk, not a used gigabit US-8. Used US-8 and Flex Mini 1G lots are still one-gigabit boxes.
SKU USW-Flex-2.5G-5. Four 2.5GbE copper ports plus one 2.5GbE PoE-in for power. USB-C 5 V / 1 A brick in the box. Maker max 5 W on the brick, 6.4 W on PoE-in. Non-blocking 12.5 Gbps, switching 25 Gbps. UniFi Network 8.4.62 and later. Polycarbonate puck, not a 1U. No PoE out: it takes power, it does not feed APs.
UI store, 23 Aug 2026: $49 / $52 surcharge-incl. Authorized Multilink printed $52.15. CDW printed $64.99 on a 4–6 week card. Amazon B0CPT3K48S was a third-party card at $72.19 whose model string still said Flex Mini. Print the live tag. Buy the store.
What to buy
| Box | What it is | Street, 23 Aug 2026 | Buy if |
|---|---|---|---|
| USW-Flex-2.5G-5 | Five 2.5G ports. USB-C or PoE-in. No PoE out. 5–6.4 W. SKU USW-Flex-2.5G-5. | UI store $49 / $52 surcharge-incl. Multilink $52.15. Skip Amazon 3P $72. | The house is already UniFi and you want a 2.5G desk or closet puck, not PoE. |
| USW-Ultra 60W | Fanless PoE switch. The box if two APs need watts. | See the Ultra note. Print the live tag. | You needed PoE, not five 2.5G copper ports. |
| TL-SG105S-M2 | Unmanaged 5× 2.5G metal. No UniFi. | About $35–39. See that note. | You are not in UniFi and you just need five 2.5G ports. |
| Used US-8 / Flex Mini 1G | Five or eight gigabit ports. The lot people still list as a UniFi deal. | No used-lot price here. | You like 1G on purpose. Not the closet default if the NAS is already 2.5G. |
Skip
Skip used US-8, US-8-60W, and Flex Mini 1G lots. Still 1G. Skip Amazon third-party cards at $72–$78, and skip any listing whose model string still says Flex Mini on a 2.5G SKU. Skip this puck if you needed PoE out. That is USW-Ultra. Skip it if you are not already UniFi; buy SG105S-M2.
Sources
UI store USW-Flex-2.5G-5 ($49 / $52 surcharge-incl.; “5-port 2.5G, PoE or USB-C”; fetched 23 Aug 2026). Multilink authorized card $52.15 (4× 2.5GbE + 1× 2.5GbE PoE-in, 5 V / 1 A USB-C, max 5 W brick / 6.4 W PoE, 12.5 Gbps non-blocking, UniFi Network 8.4.62+). CDW $64.99 on a 4–6 week card. Amazon B0CPT3K48S third-party $72.19. Street moves. Print the live tag.