Here, the device with which I have tested it:
Tablet PC, HTC Flyer: invites normal with just over 9 watts, gets by "Mumby" 2.2 watts. Charging time
Thus, many, many hours. Not to use, unfortunately, I had bought it just for that.
Ipod Touch: gets exactly what it bar shows also from other chargers, good 4 watts.
Logitech Harmony Universal Remote Control: normally takes about 4 watts, "Mumbi" delivers nothing, 0 watts. The remote control also indicates no load signal.
Anyone serious about universal searches: Stay away. If you have a device that "served by" Mumbi "" can live with it. I personally do not think it's OK that someone sold me something.