A spark ignition device, metal shell, and methods of construction are provided. The system includes a good read indicator, a bad read indicator, and control circuitry for notifying an operator of a result of attempting to read a number of product labels, including at least one of a barcode label and a radio frequency identification label on an item. Each transconductance stage has an input coupled to an intermediate node of the feedback network and an output coupled to the input of the high gain amplifier.