Simply prepare a small breeding box and install this product to manage the internal temperature of the box. ※ This winter version was created in response to requests from customers who purchased the Peltier cooling device in the summer. ■ Components ① AC100V (220V compatible) → DC12V 12.5A power supply unit (with AC cord) ② PTC heater: DC12V 100W + DC12V fan ③ Thermal sensor switch (details sold separately) with DIY instruction manual ④ DC12V 40A relay: JD1912 normally open ⑤ Wiring: 2.5sq ■ Product Specifications ・ The maximum temperature increase varies greatly depending on the material and size of the box. Please refer to temperature increase tests ① and ②. ・ Main specifications of the thermal sensor switch (the range that can actually be adjusted is the capacity range of the heater) Adjustment range: -50℃ to 110℃ (temperature to turn OFF the heater) Hysteresis range: 0.1℃ to 15.0℃ (how many degrees below the set temperature to turn the heater ON again) Mode: H mode (ON with temperature increase: this time, this one), C mode (ON with temperature decrease) ※ Please refer to the DIY instruction manual for details. ■ How to Use ・ Prepare a breeding box ・ Fix the PTC heater inside the box The blade surface is the intake surface, and the radiator (metal part) surface is the hot air outlet surface. Leave enough space in front of the intake surface and the hot air outlet surface. Perform heat-resistant treatment as needed. Securely fix it so that it does not peel off due to heat. Please note that the temperature immediately before the heater may be 56℃ higher than the internal temperature of the box. ・ Close the lid of the breeding box. Seal the gaps. Surround with insulation material as much as possible. ・ Set the thermal sensor switch. Refer to the included DIY instruction manual for details. ■ Important Notes ・ Be sure to read the important notes in the 8th photo. ・ Please use the product after fully understanding the characteristics of the PTC heater. ・ Wiring processing is performed in Japan by a qualified electrician. ・ This is a handmade product and is not a perfect product. We will repair or refund for initial defects upon arrival before receiving the contact, but we cannot provide any other support. ・ In case of failure or modification of the product, we will accept it if you can bear the round-trip shipping costs and the repair parts costs, so please feel free to contact us.