I ordered 2 pcs of them and one was defective because the switch is engaged leftmost or was pinched when mounting the housing under the housing. Thus, the processing is unfortunately bad. The 2nd was outwardly OK, but when using it has made my SmartCard broken although the settings were correct already 2 times. I had the 2nd time to order a new smart card and so I gave up and send the two EasyMouse back. I'll try it with Smargo Reader.