Band decoder for LAB599 and Xiegu transceivers More information here - https://ra0sms.com/tx500-g90-banddecoder/ It works via CAT protocol. 19200 kb/s - for Xiegu 9600 kb/s - for LAB599 Schematic PCB PCB dimension - 80*40mm Power supply via USB Outputs - open collectors (ULN2003)