@robertusa?ý Because the site, we are on, uses 410-430 MHZ. I will probably have to sell the 450-470mhz and purchase a whole new system.   ...

Thanks all for your help I found 2 radio modules.?ÿ ?ÿ 59400-62 60384-42 Bluetooth 410-430 MHz and?ÿ P/N 64235-62 410-430MHz Bluetooth Radio ...