The charger is quite small, and it appears that it is NOT a GaN charger (not that Anker advertised it), but it seems largely not important. It does seem to fast charge my iPhone and my Chromebook so that's all good. Something to note is that the product description doesn't clearly state it, but it DOES seem to support USB PD 3.0. the manual shows the outputs to be 5v-3A/9V-3A/12V-3A/15V-3A/20V-3.35A. Anker's own website seems to imply that PIQ3.0 (which is advertised here) is compatible with PD 3.0, so if you are wondering about that aspect of it, I think you can comfortable buy this.