Positive
(+) Terminal AC 100 - 240 V 50 - 60 Hz at max. 800 mA
(+) Four ports (2x 2.1A and 1.0A 2x)
(+) Stable formation by small non-slip feet
(+) Neutral and discreet design
(+) The price - performance ratio super
(+) Good workmanship
(+) Lightweight
(+) Will absolutely not hot
(+) Operates silently, no hum hum or whistle of transformers
Negative
(-) Short power cord
(-) Control LED too bright
By RAVPOWER I tested listed below devices without problems even while charging.
Samsung ACE (does not take any power supply)
Cubot X6
LG 70
Sony Bloggy (also does not take any charger seriously)
Asus Tablet PC 173x
TolinoTablet
Portally TV DVB-T TV DT-4307TRX
Music Angel Portable Mini Stereo Speaker
RAVprower battery with 3000 mA
I consider myself to review statements restive back. But the 4 Port USB Wall Chager gets an absolute buy recommendation. Both the equipment and the supplier ZBT International Trading GmbH.