The AcuRite Access is an upgrade to the HUB. The Access has a back up battery feature that the smartHUB does not have. The back up will allows you to store up to 12 hours of data if you lose network or power to the unit. My AcuRite will also update the missed readings once internet is restored. The Access is also compatible with 1GB switches and the Apple routers where the HUB was not. We are happy to answer any questions regarding the new AcuRite Access that you may have. Thank you.