BTSearchIntervalOnAC specifies how often the computer will search for other devices using Media Transfer Protocol over Bluetooth (MTP/BT), while plugged in.
By default, the computer searches for devices that have been paired and enabled for the MTP/BT service. While the computer is plugged in to AC power, it will perform this search every 120 seconds.
BTSearchIntervalOnAC is set to 0, then the computer will not search for these devices while it is plugged in to AC power.
Specifies how often the computer will search for portable devices using MTP/BT while plugged in to AC power.
The default value is 120 seconds.
Microsoft-Windows-WPD-BusEnumService | BTSearchIntervalOnAC
For the list of the supported Windows editions and architectures that this component supports, see Microsoft-Windows-WPD-BusEnumService.
The following XML output specifies that the system will search for MTP/BT portable devices every 60 seconds while plugged in to AC power, and will not search for MTP/BT portable devices while on battery power: