Function Buttons: 1. Long press three seconds (turn on / off) 2. Touch key, cycle switching speed. 3. Working: blue light flash. 4. Charging: red light flash. 5. Full of electricity: blue lights bright. 6. Electricity shortage: red light flash. Specifications: Product Name: USB Portable Hanging Sport Fan Power Consumption: 0.3-1.2W Material: ABS Plastic Color: Green,Blue,Pink,Black,White Quantity: 1 Pcs Package Contents: 1 x Sport Fan 1 x Micro USB Cable