Does the ac adapter work in japan (100v)?

AC adapter works with 100v, grounded outlet.

Can you connect another usb hub to the usb ports?

Your question probably could be simply answered yes. But the real answer is why and what will happen. You plug this into a single 3.0/1 USB port to connect to the computer. It can only pass so much data and it cannot double that data or anything else. So attaching another Sipolar hub might work, but you will not get the result you expect. Better to plug it into ANOTHER 3.0/1 USB on the computer. Daisy chaining them really is not a great idea at all. Not even for charging lots of mobile phones are other computer batteries. But on their own USB ports on the computer will give you what you want, I think. Somewhere in my foggy memory I think most computers can support 20 usb ports without a problem. However, once again, remember that each port on its own only supports so much. If you are trying to put a bunch of ASIC USB miners together, it might just work on a daisy chain. But you also have to remember power. The unit is 12v 10 amp, and if you are pushing those miners you will have to give them more power. I think they want 2.5amp so you need to get a more powerful power supply to jam 10 in each one. Hope that helped.

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Sipolar A-423 10-Port USB 3.0 Hub, 120W, 2.1A/Port, 5Gbps Charge & Sync | 10 USB 3.0 ports with 120W power, up to 2.1A per port and 5Gbps data for repair, testing and multi-device workstations

Product ID: 162500382

Details

Brand
sipolar
Color
black
Compatible Devices
Card Readers
Hardware Interface
USB
Special Feature
Powered

⚡120W total power output

🔌10 USB 3.0 ports

🚀5Gbps ultra-fast data transfer

HK$1236

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔗 Power, speed, and control — all 10 ports blazing!

BLAZING FAST SYNC - Transfer HD movies in seconds with 5Gbps USB 3.0 speeds—10x faster than USB 2.0.
POWER THAT KEEPS UP - 120W total power with 2.1A per port ensures rapid charging and stable device performance.
COOL SAFE OPERATION - Built-in cooling fan and overload protection keep your devices secure and running smoothly.
EXPAND YOUR WORKSPACE - Connect up to 10 devices simultaneously without compromise.
PLUG PLAY DOMINATE - Seamless compatibility across Windows, Mac, Linux—no drivers needed, just instant productivity.

The Sipolar A-423 is a premium 10-port USB 3.0 hub delivering up to 5Gbps data transfer speeds and 120W total power with 2.1A per port. Crafted with a durable aluminum alloy body, it features built-in cooling and overload protection for safe, reliable multi-device connectivity. Compatible with major operating systems and designed for effortless plug-and-play, it’s the ultimate hub for professionals managing multiple peripherals and demanding workflows.

Specifications

ASIN	B07Y9DJ84Q
Additional Features	Powered
Best Sellers Rank	#815 in USB Hubs
Brand	sipolar
Color	black
Compatible Devices	Card Readers, Desktops, Laptops, Printers
Customer Reviews	4.4 4.4 out of 5 stars (33)
Data Transfer Rate	5 gigabits_per_second
Enclosure Material	Metal
Hardware Interface	USB
Item Highlight	10 USB 3.0 ports with 120W power, up to 2.1A per port and 5Gbps data for repair, testing and multi-device workstations
Manufacturer	Shenzhen Lpsen Technology Co., Ltd.
Mfr Part Number	DH112257
Model Number	A-423
Number of Ports	10
Operating System	Linux, Windows 10, Windows 8, Windows Vista
Total Usb Ports	10

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