This is a genuine wireless receiver for the Logitech G700 and G700S gaming mice. Operation has been confirmed. If your mouse is not working, you can download the Logitech Connection Utility software from the following URL and re-pair it to enable use. https://support.logi.com/hc/ja/articles/360024852253--%E3%83%80%E3%82%A6%E3%83%B3%E3%83%AD%E3%83%BC%E3%83%89-%E3%83%AF%E3%82%A4%E3%83%A4%E3%83%AC%E3%82%B9-%E3%82%B2%E3%83%BC%E3%83%9F%E3%83%B3%E3%82%B0-%E3%83%9E%E3%82%A6%E3%82%B9-G700