Note The serial number consists of a letter followed by six characters (e.g. gxxxxxx). The MAC address has this format: 70:ee:50:xx:xx:xx. You can find the serial number/MAC address of your Classe 300 EOS: — In the Device Settings / General Information menu. — In the App Settings / My Products / Name of your Classe 300 EOS menu. — On the label on the back of the product.