This 9V replacement power adapter from myVolts is compatible with Brother P-touch EDGE Label printer.
The plug fits a US 2-pin wall power socket.
This power adaptor is designed to meet the power specification of the P-touch EDGE Label printer referred to here - it is the correct voltage, amperage and tip size.
It meets and exceeds all US safety standard, features overvoltage, overcurrent and short circuit protection to protect your device