What are these devices on my network?

[megaphone]

I look after a small public Wifi network. I have a few devices I cannot ID, there are about 4 starting NP- for example NP-32556N0634** . They are downloading lots so I guess they are steaming video etc. Probably kids.

Anyone know what these devices are?

Edited by megaphone on Tuesday 26th July 10:13

Edited by megaphone on Tuesday 26th July 10:14

[megaphone]

Thanks, yes could be Roku, although I have seen some Roku boxes, as they do show up a Roku.

Not a real issue, I have bandwidth control on, can block them if they take the p. It's a small holiday park, so transient users.