The RPB C40 is an advanced temperature control system for SAR. The C40 can cool incoming air by up to 52F (29C) or heat it by up to 33F (18C), maintaining you at your optimum body temperature so you don’t suffer from heat exhaustion or chilling. You can easily adjust the temperature of supplied air with the slide of a lever, or the airflow by turning the flow control dial. Little maintenance is required with the C40; air silencers are the only parts that need cleaning or replacing. The 03-501 is fitted with the 1/4" Plug.