Well the last one synthesized set sold really quick. So I am posting another set. This is the 72mhz synthesized Spectra Module & two New Polk Seeker II 8 channel synthesized receivers. I tested all 3 items and they all work great.. The module is used, but the two receivers are new and never been used. I have tested the module in Futaba 8u and 9CAP transmitter and it worked great with both receivers. Please note in Futaba transmitters the module goes in upside down. Its also a tight fit.. For those people who don't mind using 72mhz and want to be able to change channels without crystals, $110 shipped in the US. Payment with PayPal.