Thank you for viewing. This heater is ideal for places where temperature control is needed in winter, such as simple greenhouses and insect breeding greenhouses. For many years, I have built my own constant temperature tanks that can maintain a constant temperature throughout the year by connecting this heater + a spot cooler to a temperature controller, and have used them to breed insects (Hercules beetles, Dorcus hopei). It is a very energy-efficient and safe heater. Base Heater BH-210 Rated: 100V 210W Size: Width 46cm, Depth 19.5cm, Height 6cm Weight: 2kg Material: Aluminum, Anodized Side Panel: Polycarbonate resin Screws used: SUS stainless steel Note: This heater does not have a thermostat, so please be sure to use a thermostat in conjunction with it for safety. This product is a used item. We will check the operation when shipping the product, but we cannot accept any claims for malfunctions after that.