Question about RAVPower RP-PB044 Outdoor

I've had the thing for over a year but haven't had a clue. So I tried it out.

And yes, you can charge the powerbank and at the same time continue charging a device plugged into the powerbank.
However, I can't say anything about the speed. I used a Huawei 40 Watt charger.

I hope my babbling helps.