I bought a 3900 series. appears it only works with 2.4. are there any which work with 5.8?
Thanks for the inquiry.
The Roku Express models are only compatible with wireless b/g/n networks on the 2.4 GHz spectrum. Other Roku devices will have the ability to work on the 5 GHz spectrum.
For specific information regarding what each model's compatibility, visit our Products page here: Compare Roku streaming players