Is AC Adapter required or can I use hub without connecting power Adapter?
1089887
Yes, the adapter is required. I have both 3.0 external hard drive and 2.0 flash drive connected to the hub and neither is connected when the adapter is removed. I didn't know that either from the info provided on the product page. The hub works well but I would have preferred a unit that didn't require the adapter to be used. Also, the adapter cord is not very long so you'll need to have your computer fairly close to an outlet. However, it really does work well.
1089888
I'm not sure why there are a couple of varying answers to this. On my unit the power adapter IS required, which is a bit of a disappointment for me as I was expecting to only have to use it with higher-power devices like USB hard disks. (This was based on the first answer on the list here; unfortunately I did not open the window to see the others.) It will NOT light up, and Windows will not recognize, even low-power devices (like USB sticks and mice) without the wall wart.
1089889
Yes, it can be used without connecting the power adapter if your USB device power requirements are low enough. The only power available in that case would be the power supplied by your USB port on the computer, usually only 500 ma.
443939
I have not attempted to use the hub w/o the power adapter, as I have nine USB components connected to it, including a webcam, two printers, two scanners, turntable, VCR, DVD drive, etc.
1648032
If I understand you right, yes. The hub is powered and will provide power to any thing plugged into it (optical mouse, keyboard, Thumb drive). The 2 "high" power ports are for fast charging something but does not fast charge if the hub is connected to a PC. They supply the usual USB voltage.
1637834
No you have to use a power adapter like this http://www.amazon.com/gp/product/B00KKU7U6W
1649817
I just tried mine without the power plugged in, and it worked OK with the track ball that is plugged into it. However, I suspect that any device that requires power from the USB bus (like an self-powered hard drive) would NOT work unless the hub itself is powered.
1865185
Yes. It can be purchased with an AC power adapter. I don't know if it can be used with a generic adapter as the power requirements may be different. I use this hub for my Surface Pro 3. Can't address other devices.
424932
No there is no ac adapter. It does not require power. The switches on the front are mechanical, not electrical.
296141
It depends on its power usage. It may require the full 500mA coming from your computer's USB port. A hub shares its power limit across its ports. As long as no other devices attached to the hub require port power, it should work fine attached to it. If there is any doubt, don't do it as you are running the risk of data loss and physical damage to the card(s) and/or reader.
2020841
The hub itself can use an ac adapter (not included) however it is not required from my experience. But, if your external drives use an external power such as a ac adapter then yes you would still need the power for those drives but not for the usb 3.0 hub itself. You would only need to power the hub itself for power hungry applications. I currently have a WD Ultra Passport external drive (which requires no external power) and two external disc drives attached to mine (one lightscribe dvd writer, and one asus bluray writer drive) each of which is powered seperatly by ac cord. My 4 port Sabrent USB 3.0 Hub has no power to it other than the computers bus power. I hope this helps. Cheers! The hub itself can use an ac adapter (not included) however it is not required from my experience. But, if your external drives use an external power such as a ac adapter then yes you would still need the power for those drives but not for the usb 3.0 hub itself. You would only need to power the hub itself for power hungry applications. I currently have a WD Ultra Passport external drive (which requires no external power) and two external disc drives attached to mine (one lightscribe dvd writer, and one asus bluray writer drive) each of which is powered seperatly by ac cord. My 4 port... » Read More The hub itself can use an ac adapter (not included) however it is not required from my experience. But, if your external drives use an external power such as a ac adapter then yes you would still need the power for those drives but not for the usb 3.0 hub itself. You would only need to power the hub itself for power hungry applications. I currently have a WD Ultra Passport external drive (which requires no external power) and two external disc drives attached to mine (one lightscribe dvd writer, and one asus bluray writer drive) each of which is powered seperatly by ac cord. My 4 port Sabrent USB 3.0 Hub has no power to it other than the computers bus power. I hope this helps. Cheers! « Show Less
2131947
Wish I could help but I bought this adapter for a USB Hub. I wouldn't know about it powering much else. Best of luck in finding what you need.
264637
If power adaptor is an issue you can get by without using it. It takes the computer's internal 4 pin molex connector which is a day saver.
765451
You will need an adapter to to fully use this device. What you lose is the powered USB hub. What will still work (provided you have the motherboard ports for these items): USB 3.0, card reader, Esata.Most likely the hub will also work - it just won't be powered.
443941
The unit comes with a power adapter but you don't need to use it. I have a ext HD, wireless mouse/ keyboard combo controller and my UPS USB cable hooked up to it without the power adapter plugged in.
1833251
This answer may not be satisfactory, but the unit I purchased did not come with an AC adapter, however I had one (120V) that did work (I save all my old wall wart power supplies). But as it turned out I did not need to use an adapter because the unit gets its power from my PC through the HDMI cable, thus no power supply is connected. Anyway, I've been quite happy with the performance of this unit.
594082
You need to connect the AC power to power this 7 port hub. It come with the unit.
903085
as long as the power supply for the hub has power, then yes. it doesn't even have to be plugged into a computer if you are just using it for charging.
1617681
I think you would be better served with a power adapter hub... search "usb hub with power adapter" on Amazon. I wouldn't put a HD on this Sabrent USB 4port Hub 2.0, it seems to lose connections with HDs too easily.