Argo Outdoor Temperature Boiler Reset Module DPM2The DPM2 Monitors Outside Temperature & Adjusts Boiler Water Temperature To Match The Outdoor Demand- Maximizing Effciency And Reducing Fuel Usage / Can Be Used With Any Argo Relay Or Zone Control / Can Also Work With Most Competitors' Relays / Reduces Heating Costs An Average Of 10% To 15% Per Year. Includes Outdoor Sensor with Shield, Strap-on Supply Water Sensor, and Data Port Ribbon Cable Connector Product Specifications BRANDArgo LENGTH INCHES6 WIDTH INCHES5 HEIGHT INCHES3-1/4 WEIGHT LBS2 COLORBlack LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERDPM2