C:\Program Files (x86)\Android\android-sdk\platform-tools

Restore monitors after ADB unauthorized issue:

1) With POE & USB unplugged, run FactoryTool v1.40 & follow steps below.
	- Click Firmware button then navigate to recovery image file (for 7inch its called 115.31.2.527.img)
	- Hold down SW3 switch on motherboard & connect POE. As soon as FactoryTool detects the monitor release SW3.
	- Click Run button to begin restore.
	- Monitor will reboot.
	- Click Stop button in FactoryTool & then exit the program.
	- When prompted, choose to allow USB debugging.
	- A prompt in Chinese will appear after booting. Press the response button on the right.

2) Verify MAC Address & restore if necessary
	-  From Akuvox home screen, click More button
	- Click System Info button
	- Navigate to MAC Address (in the Basic tab). 
	- If MAC Address is empty we need to set it's MAC Address manually with ADB.
		- Open Command Prompt & change directories to the ADB directory
		- Type 'adb shell"
		- Type 'su' to enable super user
		- Type 'chmod 777' to give write permissions
		- Type 'info_tool set_mac_addr eth0 [device's MAC Address] (if you get a 'no such file or directory' error replace 'eth0' with 'eth1' in the command). 
		- Type 'exit' to exit su mode
		- Type 'exit' to exit adb shell
		- Type 'adb reboot'
		- When monitor boots up, repeat the above steps to confirm the MAC Address now displays.