This tag is the new APT12 tag that Biomark is manufacturing to replace the TX1411SST-1. It is the same dimensions as the TX1411SST-1. The APT12 performs better in high EMI environments compared to the TX1411SST-1. The performance of both tags is very similar under low EMI environments.
Biomark has tested this tag extensively and it meets the "PIT Tag Performance Characteristics" listed in the PIT Tag Selection Guide.