Check the listing for details. PiFire Relay Module, DIY Pellet Smoker Controller for Traeger Pit Boss etc.. Condition: New. Listed at 9.50 USD. This is not the complete controller. It is one of three modules to complete a PiFire controller. Check other listings for *Main Module* and *ADC Module*. PiFire Relay Module Options Relay Module Type PiFire Relay Module SSR (For AC Fans)PiFire Relay PWM Module SSR (For PWM Fans)Kit Options Bare Board Bare Board + Components KitFully assembled PiFire Relay ModuleIf there is interest in other relays please let us know. About PiFire: PiFire is a Smart WiFi enabled controller for your pellet smoker / grill. The latest version of the PiFire hardware is v4.0.2 and it is modular. Modules include the Main Module, Relay Modules (controls fan, auger, igniter and Power), and the ADC Module (for temperature probes). Please check our other listings for additional modules.