New USB Mini Wind Power Handheld Fan Convenient And Ultra-quiet Fan High Quality Portable Student Office Cute Small Cooling Fans

Power mode: USB Specification: 149 * 70 * 20mm Noise: below 36dB (inclusive) Rated voltage: 5 Rated power: 4.5 Rated frequency: 4W Applicable area: 0.1 square meters Wind speed gear: 3rd gear Range: 3-6 hours (inclusive) Fan blade material: plastic Operation mode: mechanical Does it support charging: Yes Built in battery: Built in battery Built in battery capacity: 240mAh Motor type: Brushed motor Fan classification: USB fan