Accuracy of Shelly EM devices (Messgenauigkeit von Shelly EM)

Hi. I'm planning to but a Shelly EM for household consumption. Sadly there's no info on the device's accuracy anywhere. Does anyone have experience with it, or any figures for accuracy? I'll probably get 2x50A CT clamps with it. Thanks in advance.

Thanks, SparkyMaster. Is it noted somewhere in the official docs? Maybe it just escaped my attention. 1% sounds good enough - I guess no figures on calibration data, like phase shift vs. current and accuracy at different amperages?