Also, I still not have the answer from supplier about:1. What is the frequency GHz of these two sensors?2. Did supplier randomly pick up two sensors assembled to test and got the result?3. Supplier endorse for 1.5m+0 degree or 0.3m+80 degree, why 80 degree, how about other distance and angle performance? 4. What the false trigger looks like, never off or else?5. In 1.5m+0 degree or 0.3m+80 degree, how many times did they conduct the test?6. Can we ask supplier deliver back to us and retest?