ALFA AWUS1900 802.11ac 1900 Mbps Dual band 2.4/5 Ghz Wi-Fi USB Adapter AC1900


ALFA AWUS1900 is a new quad antenna 802.11ac Wi-Fi USB receiver boasting router connection speeds of up to 1900 Mbps (1300 Mbps for 5 GHz + 600 Mbps for 2.4 GHz). It is compatible with Microsoft Windows 7, 8/8.1, and Windows 10. This connects to your computer's USB port with enclosed USB 3.0 cable and boosts the Wi-Fi performance of that specific PC. This is not a router or repeater.

Its four transmit/four receive (4T4R) dual-band antenna technology allows utilization of both 2.4 and 5 GHz radio bands on 802.11ac routers for a combined max connect rate of 1900 Mbps.

The antennas can be detached and extended or upgraded (extension requires optional coaxial cable extension not included in retail box).

What comes in the box:

1x ALFA AWUS1900 USB adapter
4x dual band 5 dBi gain RP-SMA antenna
1x USB 3.0 USB cable
1x clip (can be used to clip to some laptop bezel)
1x installation DVD-ROM (driver available online if PC has no DVD drive)

Chipset: Realtek RTL8814U
See full factory spec sheet here for additional details like power and sensitivity.

Speed testing:

Broadband companies in the United States offer speeds varying between 6 Mbps and 100+ Mbps. In those cases, if you are the only user on your network you won’t see any difference in download speed whether you use this 1900 Mbps product or a slower one with a max of 300 Mbps.

You will see a big difference if the network has a number of users (provided the router to which you are connecting is 1900 Mbps capable). If you use this adapter with an older 150 or 350 Mbps 802.11n router, this adapter can only connect as fast as the router allows.

You will also see a big difference in local file transfers. We completed a test here where we transferred a file of 1.69 Gbps from our router’s storage device (Tenda AC1900 router). We then attempted to transfer this file to the same computer on the network, two different ways. First via the laptop’s built-in Wi-Fi card, a standard 802.11n card capable of 300 Mbps max transfer. The file took 350 seconds to transfer to the computer.

We then deleted the file and connected the same laptop to the Tenda router with this ALFA AWUS1900 802.11ac USB adapter, and achieved an actual connection rate to the router of 1.3 Gbps (that’s gigabits per second!). The transfer time from the network storage drive was just 70 seconds. That went 5 times faster with the ALFA AWUS1900.


While AWUS1900 is backward compatible with dual and single antenna routers, you will get the best performance in your home when pairing with an 802.11ac router capable of beamforming. This is a special type of technology that can concentrate signals stronger in the directions of connected devices as opposed to just radiating a signal evenly in a 360 horizontal pattern.



IEEE 802.11a/b/g/n/ac

2.412GHz – 2.472GHz
5.15GHz – 5.825GHz

802.11b: up to 11Mbps
802.11g: up to 54Mbps
802.11n: up to 600Mbps
802.11ac: up to 1300Mbps

4x External detachable dual-band
2.4GHz+5GHz 5dBi antenna

Antenna Connector
RP-SMA female

Channel Width
20 / 40 / 80MHz

LED Indicators
Power, WLAN

OS Support
Windows 2000, XP, Vista, 7, 8, 10
Mac OS X 10.7-10.12

Output Power ( +/- 2dBm )
802.11a: 21dBm
802.11b: 23dBm
802.11g: 20dBm
802.11n: 23dBm
802.11an: 19.5dBm
802.11ac: 20.5dBm

802.11a: -72dBm
802.11b: -84dBm
802.11g: -70dBm
802.11n: -90dBm
802.11an: -88dBm
802.11ac: -84dBm

64/128bit WEP
WPA (TKIP with IEEE 802.1x)
WPA2 (AES with IEEE 802.1x)
WPA Mixed

Operating Temperature
-10°C ~ 60°C

Storage Humidity
5% ~ 98% (Non-condensing)

62 x 85.3 x 24 mm


Product Comparison:

Additional Resources:
ALFA Express TV: Comparing ALFA 802.11ac Dual Band Wi-Fi USB adapter options
WPA3 security support now available for AWUS036AC, AWUS036ACH, AWUS1900
How to install AWUS036ACH and AWUS1900 on Kali Linux 2020.1 w/ monitor mode
The Gadgeteer on Alfa AWUS1900: Light weight but powerful

Warranty & Support:

Complimentary Telephone and Email/Live Chat Support (Click Here)

State sales tax of 7% will be added to FLORIDA purchases only. There is no sales tax for any other state.

Return Policy: You may return any item, open or used, for an exchange or refund at your discretion within 30 days of receipt. Because range can vary greatly based on your environment, if you are not sure a particular product will meet your range needs please contact us before buying. Orders with free shipping selected will incur a 10% restocking fee to help us cover the original shipping cost, unless the item is defective or different from the advertisement. Any expedited shipping charges paid, including return shipping, are never refundable. If you opt for an exchange, we will pay to ship the replacement to you. Items must be returned the way they were received, with all pieces, documentation, and retail packaging (if applicable) included. For bulk purchases, see our bulk purchase return policy here.

Customer Reviews

Based on 9 reviews
Steven W Miles
Not as good as advertised

The adapter does pick up from alittle further then my laptop but it seems to drop in strength and drops completely when it warms up


I have, it doesn't work, so is there no other way?

packet injection problem

Very powerful adaptor, it shows the surrounding Wi-Fi networks and devices on monitor mode but what ever I do it doesn't inject packets for some reason.
can you help me with this issue please?

Try this driver here for AWUS1900 which supports injection:

Problems with use in Kali Linux

While the Product is great and powerful as a network adapter and comes with very handy clip-on accessories (clips onto your computer), it has a currently unresolved problem in Kali Linux (I'm using a virtual machine to run kali Linux, i.e. Virtual box, VM ware, etc.). ---

The problem is that the network adapter can't perform death attacks and most likely other similar attacks which are a large issue

---, as it just comes up with an error message saying "Couldn't determine current channel for wlan0, you should either force the operation with --ignore-negative-one or apply a kernel patch" (-ignore-negativity-one just forces it and as a result, the attack doesn't work [zero packets are delivered]). Also not to mention the problems and hiccups with installing its drivers on a Kali virtual machine. If you want this for Kali, I heard the AWUS036ACH works well.

try this driver here and let our team know if you still have deauth issues:


hey Alfa AC1900 is not better in range than AWUS036ACH?

Customer Reviews

Based on 2 reviews Write a review