I got this unit in my hands today and wanted to share some pics with you.
It seems a pretty cheap led-based detector, chinese construction with poor abilities. I did a short test with a ProLaser2 and the unit wouldn't go off immediatelly, like it had to.
I was disappointed with the performance of the unit. Using the RLT-500 tester, when testing a BEL550 or a V1 or a crappy Quintezz detector, even with pointing the wall, all the detectors would go off , receiving the reflections of the signal. The Micro Fuzion wouldn't go off unless you would point straight to the led-operated sensor.
As you will notice by viewing the last picture of the series, it is printed on the PCB the place of many led diodes to receive the signal, but apparently they are missing.
Any questions you might have, feel free to ask.