Yamaha PSR-I455 Owner's Manual page 3

The model number, serial number, power requirements, etc.,
may be found on or near the name plate, which is at the bot-
tom of the unit. You should note this serial number in the space
provided below and retain this manual as a permanent record
of your purchase to aid identification in the event of theft.
Model No.
Serial No.
(bottom_en_01)
3
PSR-I455 Owner's Manual