Fan classification: hanging neck fan. Shell material: ABS+silicone. Power supply mode: USB. Whether built-in battery: built-in battery. Built-in battery capacity: 2000mAh. Wind speed gear: 3 gears. Operation method: button. Whether to support charging: support. Combination form: single piece. Color: black, fruit green, white. Appearance size: 53*6.3*4.4cm/20.87*2.48*1.73 inches.