The SURC-8153, in one of the pictures, is a clue to it's being a cheap generic device from the far east (China) that has been badged. I've found this (slightly different, but it's claimed to be for the European market), but as per normal, no codes.

I'm afraid that unless someone visiting has this, or or one of it's sister models, the likelihood of finding the instructions/codes is pretty remote, if you'll forgive the pun.