Wide Temperature Range Solar greenhouse vent opener works when the temperature exceeds 20°C to 25°C (68°F - 77°F), solar vent opener will open. while temperature drops 20 °Cthe following the greenhouse kit will shut down completely.Our automatic window opener will automatically open and shut your greenhouse window to maintain the best growing temperature and preventing your greenhouse from overheating, efficiently regulating your greenhouse's internal climate. About Leopacat This brand "Leopacat" is a celebration of life, quality, and the pursuit of happiness The name itself, a fusion of "Love" and "Patience," reflects our dedication to crafting products that stand the test of time and bring a sense of love and tranquility to your life Discover the joy in the ordinary with Leopacat, where love and patience converge to create a world of positivity Greenhouse Vent Automatic Opener Automatically open and close greenhouse window based on environment temperature changes, help you maintaining the best growing temperature and prevent your greenhouse from overheatinghe greenhouse window opener does not consume any power, no batteries or electrical power needed, which is energy saving Material: ABS Temperature Range: 20-25℃ / 68-77℉ Size: 33 x 1.5cm / 12.99 x 0.59in Weight: 117g Maximum Opening Distance: 45 cm / 18in Adjustable Length: 33-45cm/ 13-18in Application: For Under 14 Kg Window Package Included: 1 x Window Opener Cylinder Only Automatic Opening or Closing No Batteries or electrical power needed using solar energy, the greenhouse automatic temperature controlled window opener automatically opens and closes through the thermal induction of temperature Reliable materials Thicker and stronger material suitable for windy mountain area, resist wind twistBoth clamp and screws included, easy installation.Solar energy sourced, no operating cost, environmentaly friendly.Both clamp and screws included, easy installation Overheat rotection When the temperature rises or falls, the solar panels open or close the ventsAs the temperature rises, the window frame gap expands and the window slowly opensWhen the temperature drops, the building window opener automatically closes the window and closes it smoothly Easy To Install Equipped with Screws, greenhouse window opener automatic set Vent opener greenhouse equipped, screw it into the panel , wood or metal frame directly with a screwdriver, simple and convenient.Suitable for most of greenhouse