SKU: 33219139443

DAHUA SG4028 28-Port Managed Gigabit Switch

$347747.40 $386386.00
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Description

DAHUA SG4028 28-Port Managed Gigabit SwitchSG4028 28 Port Managed Gigabit Switch > Supports web management. > Supports STP and RSTP. > Supports manual aggregation and static LACP protocol aggregation. > 10 100 1000 Mbps self adaptive Ethernet port. > Highly integrated, it is exquisite, convenient and easy to use. Hardware Included Power Adapter Yes Ethernet Port 26 Optical Port 2 Ethernet Port Speed 10 100 1000 Mbps Optical Port Speed 1000 Mbps Description of Function Slots Port 1 26: 26 RJ45

SG4028

28-Port Managed Gigabit Switch

> Supports web management.
> Supports STP and RSTP.
> Supports manual aggregation and static LACP protocol aggregation.
> 10/100/1000 Mbps self-adaptive Ethernet port.
> Highly integrated, it is exquisite, convenient and easy to use.


Hardware

Included Power Adapter

Yes

Ethernet Port

26

Optical Port

2

Ethernet Port Speed

10/100/1000 Mbps

Optical Port Speed

1000 Mbps

Description of Function Slots

Port 1-26: 26 × RJ45 10/100/1000Mbps
Port 27-28: 2 × SFP 1000Mbps

Debugging

Console × 1

Reset Button

1

Power Supply

12 VDC

Operating Temperature

–10°C to +55°C (+14°F to +131°F)

Operating Humidity

10%–90% (RH)

Storage Temperature

–40°C to +75°C (–40°F to +167°F)

Storage Humidity

5%–95% (RH)

Power Consumption

Idling: ≤ 6 W;
Full load: 24 W

Performance

MTBF

467125.73 hours

Switching Capacity

56 Gbps

Packet Forwarding Rate

41.664 Mpps

Packet Buffer Size

4.1 Mbit

Jumbo Frame

10K Byte

MAC Table Size

8K

VLAN Number

4K

VLAN Interface

10

Communication Standard

IEEE 802.3x

Feature

Spanning Tree Protocol

STP, RSTP

VLAN Function

Yes

Link Aggregation

Static link aggregation; LACP

IEEE 802.3x Flow Control

IEEE 802.3X-based flow control (full-duplex)

Multicast

IGMP Snooping

DHCP Function

DHCP Client
DHCP-Server
DHCP-Snooping

Security

IEEE 802.1x

Equipment Management

WEB(http and https)

General

Statics Protection

Air discharge: 8 kV;
Contact discharge: 6 kV

Lighting Protection

Common mode: 2 kV;
Differential mode: 1 kV

Net Weight

1.57 kg (3.46 lb)

Gross Weight

2.25 kg (4.96 lb)

Product Dimensions

440 mm × 163.85 mm × 43.65 mm (17.32" × 6.45" × 1.71")

Packaging Dimensions

520 mm × 271 mm × 107 mm (20.47" × 10.67" × 4.21")

Certifications

CE
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 33219139443

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4.2 ★★★★★
Based on 2451 reviews
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Product Reviews
F
Verified Purchase
Fred Schwartz
Phoenix, US
★★★★★ 5
A Great Pair of Small PC Speakers
Size: 1 Pair, Color: Silver, Size: 1 Pair, Color: Silver
These are great little pc speakers. They hookup easily, give off great sound, have an in line cord volume control and look great on the computer desk. The only thing missing is an on/off switch so you have to detach the usb to turn off the power, if desired, when the PC is on. My usb port is on the front of my desk top so it's easy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
Z
Verified Purchase
ZharTheObscenity
Charlottesville, US
★★★★★ 3
Don't by used from amazon
Size: 1 Pair, Color: Black
Bought them used (don't do it plz) and they work well but at times I notice a hissing sound that always happens when I'm not playing any audio from them, and then there's times where there's no hissing sound. It's not the loudest but it can get kind of annoying. I'm sure it's because I bought them used but oh well, saved a few bucks and this is what I get. Other then that though the actual sound quality of the speakers is crazy good for the money. Speakers have nice weight to them and really decent bass to em as well. Just gotta give it 3 stars since Amazon didn't find it necessary to 1. Didn't clean the product before shipping so that it was in a presentable state, came to me hella dusty 2. Idk if anyone actually did long enough testing on this product when it got sent back, or else they would've fixed the hissing problem. I assume that was why it was sent back in the first place 3. Box was terribly packaged. No bubble wrap what so ever, the box the actual speakers were in also had nothing keeping them safe from getting smacked around during shipping. Multi billion dollar company can't even go the extra mile for the people who are paying them and keeping them in the business.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
L
Verified Purchase
luna
Boise, US
★★★★★ 5
Perfect!
Size: 1 Pair, Color: Black
My husband wanted old-school plug-in speakers that had quality sound. These fit the bill and at an excellent price! They function exactly how the older speakers did, plug in and enjoy! No need to mount but you can if you wanted to. Easy to use and they have great volume. He does music making and video game development, so he needed the sound quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
A
Verified Purchase
Akbar Faizi
Massapequa, US
★★★★★ 5
Unbelievable Performance!
Color: Black, Size: 6 Feet, Style: 5-Pack, Color: Black, Size: 6 Feet, Style: 5-Pack
I didn't expect such a great performance by these charging cables since even they are not brand. Decent price for a bunch of solid and plenty long charging cables. These are in high quality and charge fast the cell phone. Don't waste your money buying at the stores or the branded one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 13, 2026
N
Verified Purchase
Nonamemarine
West Palm Beach, US
★★★★★ 5
Good reliable cable
Color: White, Size: 6 Feet, Style: 1-Pack
Very good quality cable works as expected with no issues at all. Easy to clean seems more durable than the OEM cable from Apple. Well pleased- I have several.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026

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