This new SynScan Hand Controller firmware release is an update from the previous SynScan Firmware Version 04.39.20. What's new in this update? 1. Update the serial commands, 'Z' and 'z' that these two will coincide with their definition in SynScan Serial Communication Protocol version 3.3 that these commands will get the coordinates of the telescope in Alt-Azm. 2. Fix minor bugs.