Battery capacity and Voltage: 2500 mAh / 4.8V
Mounting hole diameter: 120 mm
Outer diameter 254 mm
Air flow 28 m³/h
Nicro Day&Night Solar Ventilation. The Day&Night solar fan has a rechargeable and replaceable battery. The solar cells charge the battery during the day, so the fan can run during the night and in overcast weather. Day&Night solar ventilation can run up to 24 hours without sunlight with a fully charged battery.