Product information: Portable Large Wind Portable Small Wrist Hanging Fan Noise: 45-50dB (included) Power type: lithium battery Color: Interstellar blue 5000 mA wrist suspending fan F2, interstellar blue 9800 mA wrist suspending fan F2, vibrant orange 5000 mA wrist suspending fan F2, vibrant orange 9800 mA wrist suspending fan F2, Whether to use USB: Yes Motor type: brushed motor Size: 105x72x100mm Fan Speed Mode: 3 gears