Instructions to obtain the serial number on SingTech devices

SingTech Sapphire H50 SingTech Sapphire H50
SingTech Sapphire A55 SingTech Sapphire A55
SingTech S1 SingTech S1
SingTech P501 SingTech P501
SingTech P450S SingTech P450S
SingTech Infinity L1 SingTech Infinity L1
SingTech Infinity L1 Plus SingTech Infinity L1 Plus
SingTech Infinity I-note SingTech Infinity I-note
SingTech i-Note 2 SingTech i-Note 2
SingTech I-Crystal SingTech I-Crystal
SingTech H30 SingTech H30
SingTech E11 SingTech E11
SingTech A33 SingTech A33