DEAR ALL This is email from Shanghai. SECM claims that STU-2B(TW-1B )is object 40927, 2015-051C, (437.645MHz) STU-2A(TW-1A ) is object 40928,2015-051D, (435.645MHz) STU-2C(TW-1C ) is object 40926, 2015-051B. (435.645MHz) HELLO TO ALL! THANKS FOR YOUR TIME. ZHANG XUAN FROM SHANGHAI