This is a low cost USB interface made in china.
We test all interfaces prior to shipping. We also verify that the bandwidth in close to the state 95 samples/second
This interface fits only smart phones and tablets that support USB OTG (not only USB) which most new devices do, To be able to use this interface a common "USB OTG" adapter cable is needed which can be purchased in this web shop but is also readily available in shops where you can buy electronic devices.