Specification: Type: Solar powered vehicle exhaust fan Fan number: 3 Material: ABS Voltage: 2.4 V Rotate speed: 3500 rpm Continuous working time: 10 hours Solar panel power: 4 W Current: 1600 mAh Built-in batteries capacity: 2AA*1200mAh(included) Color Optional: White / Black Solar position: Outside window Package included: 1* Solar powered vehicle exhaust fan 1* Manual