A dermatological skin treatment device is provided. The bipolar junction transistor includes a well region, an emitter electrode, a base electrode, a collector electrode, and a conductive layer. The firing apparatus may include a trigger, trigger bar, sear, and hammer that contacts a firing pin which may strike a chambered cartridge. QOS levels that are actually achieved may also be monitored, and the QOS communication parameters andor path for a data communication may be dynamically modified based on differences between actual achieved QOS levels and desired QOS levels.