A:AnswerHi there, yes this will fit into Microsoft Surface pro 9 device.
Mariepel C.| Insignia Products
https://www.bestbuy.com/site/brands/best-buy-brands/pcmcat1596746025285.c?id=pcmcat1596746025285
A:AnswerHi there!
It works with most USB devices. Connect up to 4 USB devices (including smartphones, tablets, flash drives and more) at the same time. It is USB-C connection which easily connect to your computer’s USB-C port.
Insignia Support
Angela
www.insigniaproducts.com/support
A:AnswerWere you ever able to find this on your MAC?
Click the Finder icon located in the upper-right corner of your screen. Scroll down and choose ‘Devices’ from the dropdown menu. You should see a list of all currently connected devices (USB or otherwise) displayed in this window.
A:AnswerThe hub is not powered. 2 speakers may be drawing to much power. If I plug more then 2 external non powered HDD into the hub the 3rd does not work.
One way you can test this is if you have another mouse. Try plugging them both into the hub along with speaker and all three should work. That'll tell whether or not you're drawing to much power...hope this helps.
One way to solve this problem would be to get a powered usb hub.