Features:1. With insulator on surface, safe to use, high reliability.2. Heat up quickly, long service life. With mounting holes, easy to install.3. Adopts heat-resistant silicone wire as leading wire, red wire for "+" and black wire for "-".4. This system is energy saving, when the heater increases the environmental temperature, the power will reduce gradually within certain ranges.5. Applicable for heater, humidifier, air conditioning and other commonly used appliances.Specifications:Condition: 100% Brand NewColor: BlackOptional Type: #1 Rated Voltage: 12V Rated Power: 150W (15A)#2 Rated Voltage: 24V Rated Power: 150W (10A)#3 Rated Voltage: 24V Rated Power: 250W (15A)Mounting Hole Distance: approx. 87mm / 3.4"Mounting Hole Diameter: approx. 4mm / 0.16"Product Size: approx. 60 x 60 x 42mm / 2.4" x 2.4" x 1.7"Environment Temperature Range: -5~65℃Package Weight: approx. 160gQuantity: 1pcPackage Included:1 x PTC HeaterPTC Air heater with fan series product instructions:1. When bare wire extend from the heater,the positive and negative electrode are not distinguished. Please input the rated voltage and the sufficient current.2. When bare wire extend from the fan,the red is positive electrode and the black is negative electrode. Please input the rated voltage and the sufficient current.3. The heater can be used in extremely humid air environment. It doesn't matter if a small amount of water droplets are splashed on the surface of the heater, but they can't be immersed inliquid.4. The heater's black bracket insulation is high temperature resistant, but the metal part is conductive. Please pay attention to safety when using.5. The heater's fan life span is 3~5 years, 20000 ~30000 hours.6. The heater is equipped with a chip of 230℃. When the fan blows, the surface temperature of the heater is abou