EasyAcc 28 Watt USB solar charger

The EasyAcc 28 Watt USB solar charger can charge up to 4 USB devices at the same time for less than 62 Euros. Only 282*160mm. Note to self: will test soon! Update: works really great. The only thing missing is a display, that shows the charging power. I will try out an inexpensive USB power meter to see if it shows how fast the charging occurs!