Molecular function

S-adenosyl-L-methionine:phenylethanolamine N-methyltransferase activity, noradrenalin N-methyltransferase activity, noradrenaline N-methyltransferase activity, norepinephrine N-methyltransferase activity, norepinephrine methyltransferase activity, phenethanolamine N-methyltransferase activity, phenethanolamine methyltransferase activity

Catalysis of the reaction: S-adenosyl-L-methionine + phenylethanolamine = S-adenosyl-L-homocysteine + N-methylphenylethanolamine.