I bought it for CN¥89 (S$19) (excluding shipping) at ZMI official online store in T-mall during their 12/12 sale. The usual price is CN¥99 (S$21).
It measures 127 x 69 x 12.7mm and weighs 177g.
There are two input ports, which means you can charge the power bank either with micro USB or USB-C. The USB-C port is NOT bi-directional, so it can only be used to charge the power bank.
The USB-A port supports Qualcomm Quick Charge 2.0 (QC2) and can output 5V/2A, 9V/1.6A or 12V/1.2A.
Unlike the bigger sibling, QB820, the USB-C port on this power bank does not support USB power delivery.
It also does not support pass-through.