UR-01 is a mini size voice recorder. It look like a normal USB flash drive. And support 4GB---64GB TF card. UR-01 only one button for record. It is easy to operate, good flexibility. Because UR-01 is very small and it is only 10g. You can carry it to any where. UR-01 is hot sale in American and China. One of the reason is it is very good for hidden recording.