Product Description

High Speed USB 2.0 4-Port Hub

Product Details

• Amazon Sales Rank: #2820 in Consumer Electronics
• Brand: D-Link
• Model: DUB-H4
• Original language: English, French
• Number of items: 1
• Dimensions: 3.25" h x 7.00" w x 11.00" l, 1.28 pounds
• Memory: 256000000MB DIMM
• Hard Disk: 30000GB
• Display size: 66.9291338583

Features

• High Speed 480Mbps* Transfer Rate
• Plug & Play
• Backwards Compatible with USB 1.1
• Backwards compatible
• Hook multiple hubs to each other to connect up to 127 USB products

Amazon.com Product Description
The D-Link DUB-H4 2.0 is a Hi-Speed USB 2.0 4-port hub with backward compatibility to USB 1.0 and 1.1. It provides an out-of-the-box industry standard that allows connection of up to four USB peripherals or devices to your USB-ready PC or Mac.

The D-Link DUB-H4 2.0 is designed to provide quick and easy access to the four type A downstream ports for connecting USB peripherals, devices, or other USB hubs. A single type B upstream port connects the DUB-H4 to the host computer, or another USB hub enabling up to 127 devices to be connected by cascading multiple hubs.

As a standard USB hub, the D-Link DUB-H4 buffers USB data from any attached peripheral in compliance with USB specifications to provide an invisible extension of the USB bus. Supporting both low-speed (1.5 Mbps and 12 Mbps) and high-speed (480 Mbps) devices, each port creates a bridge between the peripheral and host computer.

Diagnostic LEDs located on the top of the device provide power state (self-power) and port status on each port. The DUB-H4 2.0 is packaged with all necessary documentation, a six-foot Hi-Speed USB 2.0 AB cable, and an AC power supply to ensure that the user is able to easily and quickly install and use the device.

The D-Link DUB-H4 comes with a one-year warranty.

From the Manufacturer
The D-Link DUB-H4 2.0 is a high-speed universal serial bus (USB) 2.0 four-port hub with backward compatibility to USB 1.0 and 1.1. It provides an out-of-the-box industry standard that allows connection of up to four USB peripherals or devices to your USB-ready PC or Macintosh. The D-Link DUB-H4 is targeted at PC and Mac users that are expanding the number of USB ports on their system.

The D-Link DUB-H4 2.0 is designed to provide quick and easy access to the four "type A" downstream ports for connecting USB peripherals, devices or other USB hubs. A single "type B" upstream port connects the DUB-H4 to the host computer, or another USB hub enabling up to 127 devices to be connected by cascading multiple hubs. Configured directly by the operating system, the D-Link DUB-H4 2.0 operates seamlessly with both Microsoft Windows and Apple Macintosh Operating Systems.

As a standard USB hub, the D-Link DUB-H4 buffers USB data from any attached peripheral in compliance with USB specifications to provide an invisible extension of the USB bus. Supporting both low-speed (1.5 Mbps and 12 Mbps) and high-speed (480 Mbps) devices, each port creates a bridge between the peripheral and host computer.

Diagnostic LEDs located on the top of the device provide power state (self-power) and port status on each port. The DUB-H4 2.0 is packaged with all necessary documentation, a six-foot high-speed USB 2.0 "A to B" cable and an AC power supply to ensure that the user is able to easily and quickly install and use the device.

Customer Reviews

Two features worth noting
I think the other reviews largely get it right. Two things I haven't seen in them, however: first, the plug on the power cord is in the shape of a wide black monolith, so, like bulky a/c adaptors... Second, the included documentation says that the hub will revert to a USB 1.1 hub FOR ALL DEVICES if you have any USB 1 device connected. It says that to get USB 2.0 throughput, you must disconnect all USB 1.0 or 1.1 devices from the hub first. That's worth knowing.

Finally, if you buy the hub, I suggest going to Windows Update and downloading the optional USB 2.0 fix for WinXP SP 1.

Good product, but laptop users beware
I bought this product to work with my Dell Inspiron laptop running WinXP Pro. So far it works great with my wireless mouse, keyboard, and digital camera plugged in simultaneously. The AC power ensures that your USB-powered devices will work properly. However, there is one issue to be aware of: this hub only works when plugged into AC power, which was not clearly indicated in the specs. For this reason, it is not a good hub for laptop users on the go, which is why I give it only 4 stars. Other than that, it is a solid performer. It is small, so it doesn't clutter your desktop too much, and has rubber feet to keep it from sliding. The AC adapter is sideways so that it only takes up one plug, which is a nice detail. This would be a good choice if you are planning to use it for a desktop, particularly if you have several USB-powered devices.

Great USB Hub; Works without A/C Power for Me
I originally purchased this hub to make it easier to use multiple USB devices with my laptop while using it at my desk at home. My printer, mouse, barcode scanner, and thumb drive are all USB devices, and pulling the laptop out to unplug one and attach another was getting rather old.

It's a smallish hub, but not one so tiny that the ports are so crammed together so as to be nearly useless. At 4 inches wide and less than an inch tall, the hub should easily fit on any desk, and the rubber feet help hold it in place. The ports are widely enough spaced that you shouldn't have a problem attaching cords, thumb drives, or other USB devices.

Since I planned to use it only at my desk anyway, the caveat that an A/C adapter is required didn't bother me--but I've found that the hub works fine without any A/C power at all, and despite the instructions claiming it doesn't draw power from the USB bus, the power LED lights up, and all devices work fine. Without the A/C adapter in use, the hub also runs quite cool and doesn't suffer from the lock-up problems others have mentioned.

If you plan on using mostly powered USB devices--like printers, external hard drives or CD/DVD drives--you should be fine using the hub "unpowered." Using it for a keyboard, mouse, barcode reader, and thumb drive may require the use of the A/C power for reliable operation. And if you're worried about putting too much of a power strain on your laptop's USB bus, connect it via a docking station (as I do) or use the A/C adapter. Still, with that said, many people should be able to use it just fine without having to add another bulky "leech" to their power strips.

Finally, the manual does state that the use of both USB 1 and 2 devices at the same time may cause the hub to drop into USB 1-only mode. I stress "may," as so far the tests I've run with older devices in combination with a USB 2.0 CD burner have worked fine at USB 2 speeds--I assume then the compatibility depends largely on the actual devices used.