Does anyone know if this works with ubuntu 14.04?

No! The "real" TP-WN725N will, but these (thought advertised as a WN725N) are "NOT" the WN725N, but are made by Archer, and they don't work with LINUX, Ubuntu or LINUX Mint. If you get a real TP-WN725N and plug it in, it will work right out of the box!!

What is this for? Why would one need it if their laptop already does wifi?

I'm about 5 years behind this question and the comments :), but I can tell you that I have a 17.5" Acer 1TB laptop that is less than 18 months old, and I called to have my wireless modem replaced by Xfinity because I was only getting download speeds of about 100 - 112 when my service is supposed to deliver 250+ Mbps. But when we checked my cell phone, it showed 300 Mbps from the same router, and the tech said that my wireless card in this laptop cannot accomodate more than the 112 Mbps I've been getting! He said he's seen brand new high-end laptops with wireless cards that can't detect of connect with a 5G network like Xfinity's is. Maybe because of cost and the fact that probably a large % of people don't have service faster that 100 Mbps or so. So I haven't tried one yet, but most are in the $16 - $19 range. The top-rated (4,300 reviews averaging 4+ stars) is about $37, and that gets you 1,600 Mbps!! Hope this helps....

Is this a good option for the Raspberry Pi B+ model?

If you want this to work with a raspberry pi, use this link. https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=62371&sid=8b78a7e30c4190fad8241b2

Will this work with Windows 10?

I have Windows 10 and received a version 1 (V1) adapter from Amazon. The TP-Link driver downloads do not offer a Windows 10 download for V1; however, there is a Windows 10 download for V2 and V3. I tried to install the V2 and V3 driver anyway, and although it installed, I only get 2-5Mbs down and about 4-5Mbs up. Same speeds for what Windows 10 auto detects and installs as Realtek RTL8188EU. I am in an adjacent room to my wireless router, through one wall and about 15 feet away. I have no idea why Amazon would still ship hardware that is not compatible with Windows 10. I’m only out a few bucks, so no big loss other than it being a hassle.

ASIN	B008IFXQFU
Are Batteries Included	No
Best Sellers Rank	#399 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #5 in Wireless USB Adapters
Brand	TP-Link
Colour	Black
Country of Origin	India
Customer Reviews	4.2 4.2 out of 5 stars (150,494)
Date First Available	4 August 2012
Generic Name	Wireless Adapter
Imported By	TP-LINK India Private Limited,Green Industrial Park, Dongri Pada, Poman, Kaman-Bhiwandi Road, Vasai East, Palghar, Maharashtra – 401208
Importer	TP-LINK India Private Limited, Green Industrial Park, Dongri Pada, Poman, Kaman-Bhiwandi Road, Vasai East, Palghar, Maharashtra – 401208, Contact: Toll Free 1800 2094 168, [email protected]
Included Components	150Mbps wireless N Nano USB adapter TL-WN725N, Resource CD and Quick Installation Guide
Item Dimensions LxWxH	19 x 15 x 7 Millimeters
Item Height	0.27 Inches
Item Weight	1 g
Item Width	0.58 Inches
Item model number	TL-WN725N
Lithium Battery Energy Content	2 Kilowatt Hours
Lithium Battery Weight	2 Grams
Manufacturer	TP-LINK CORPORATION LIMITED
Net Quantity	1 Count
Number of USB 2.0 Ports	1
Operating System	Windows 10; Windows XP;Linux; Mac OS X 10.9 Mavericks
Packer	TP-LINK India Private Limited, Green Industrial Park, Dongri Pada, Poman, Kaman-Bhiwandi Road, Vasai East, Palghar, Maharashtra – 401208, Contact: Toll Free 1800 2094 168, [email protected]
Processor Count	1
Product Dimensions	1.85 x 1.47 x 0.69 cm; 1 g
Series	TL-WN725N
Wattage	150
Wireless Type	802.11b

TP-Link USB WiFi Adapter for PC(TL-WN725N), N150 Wireless Network Adapter for Desktop - Nano Size WiFi Dongle Compatible with Windows 11/10/7/8/8.1/XP/ Mac OS 10.9-10.15 Linux Kernel 2.6.18-4.4.3

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