During this post, I bought an additional keychain (which I backed up the firmware first). Anyway… The model/manufacturer is: Zipp DP605. Found a modified firmware here, mirrored here fw_disp_delightdigi_black_NEW_Zipp, Cheers superelchi and mumianex. I’ve also change the python script and lcd4linux.conf for lower CPU usage and scrolls when more than 8 are detected. Available here, and the original firmware is here full_Zipp_original.
I have purchased 2 more DPF keychains, another Kasier Bass, and a generic one from Target.
This is the original firrmware for the new Kaiser Bass (noticeable because the logo’s have changed)