Recently, we learned that many people don’t know much about how to operate the XHDATA D-109WB radio. Starting from today, we will update the operation video at least twice a week to facilitate everyone's learning and use.   1. “How to use the VM/VF buttons ?”   2.“How to switching FM/MW/SW/WB Bands?"   3."How to turn on/off LW?"   4.“How to enhance receiving sensitivity in different wavebands?”    5.“How to connect with Bluetooth?   6."Three ways to set ringtones"   7."Alarm...