Features: Efficient Refrigerating Structuremail: The 25W 4 fan set effectively expels hot indoor air Solar Actparticlemail: This fan set operates utilizing solar power, activating up to three thousand whirls when sunlight is sufficient and delaying down otherwise stopping under shadowy conditions. User Friendly Installatparticlemail: Easily place the photovoltaic panel in sunlight, install the admirers, and link they for immediate use.. Permanent and Weather Immunemail: Features a epoxy rosin face lamination and IP65 waterproof rating, ensuring strengthened durability and resistance to various weather conditions. Flexible Applicatparticlemail: Four thousand multiple settings including residences, , greenhouses, storage lodgings, and pet residences, providing efficient refrigerating in varied conditions.<br/ Specifications: Yes chip typolyethylenemail: single crystal yes Photovoltaic panel weigheight: 360g Photovoltaic panel sizemail: 360x330x2.5mm Greatest power (): 25W Permanent art potential (): 20V Greatest power potential (vmpp): 18v Model house current (): 1.5A Greatest power current (implp): 1.1A Outpbut: DIRECT CURRENT Standard test conditions =1.5 Irradiance = 1000W/㎡ Temperature = 25℃ Package Includes: 1xSolar panel 4xCase fan 1x1 point 4 1xGeneral instruction manual note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.