Serial and model numbers of speaker systems can be located either on the subwoofer of multichannel systems or on the back of the speaker unit on stereo-systems.
Serial and model numbers of these products can be located either on the the product itself or on the box that it originally shipped with.
Serial and model numbers of portable MP3 players can be located either on the external casing or inside the battery compartment if there is a replaceable battery.
The serial and model numbers are located on a sticker on the back of the radio. The serial number is in the format 123456-ABCDEF.
