Firmware files for Anker Nebula Capsule

Hi all
I have recently bought a Anker Nebula Capsule. My product came with Firmware version: NBUI_M1_V2.0.27. I am quite curious with Android system.
I am wondering if the manufacture could provide end-user like me a method to restore the capsule (offline firmware) to stock just in case something goes wrong.

Thanks for reading guys!