•【High-Speed Fan】 Features 5 speed settings ranging from 7,300 to 13,800 rpm, providing adjustable airflow to suit various needs. •【Long Battery Life】 3600mAh battery capacity offers up to 9 hours of use at the lowest speed setting, ensuring extended cooling comfort. •【Cooling Function】 Incorporates a cooling feature that can be activated separately, enhancing the overall cooling effect. •【Compact and Portable】 Foldable design with dimensions of 54.5 x 55 x 167mm and weighing only 250g, perfect for on-the-go use. •【Versatile Power Options】 USB rechargeable with the ability to use while charging, providing flexibility in various situations. Specifications: •Model: RD21 •Battery: 3600mAh 3.7V •Input Voltage: DC5V •Charging Current: 1.5A •Fan Working Current: 0.40A-1.30A (depending on speed) •Fan Working Power: 1.48W-4.81W (depending on speed) •Cooling Working Power: Approx. 3.8W •Usage Time: 2.7h-9h (fan only), 1.2h-2.0h (fan + cooling) •Charging Time: Approx. 3 hours •Standby Current: ≤ 20uA •Fan Speed: 7300-13800 rpm •Wind Speed: 3.24-5.87 m/s •Noise Level: 51-64 dB •Materials: ABS/Aluminum Alloy/Stainless Steel •Fan Blade Diameter: 44mm (2 inches) •Dimensions: 54.5 x 55 x 167mm •Weight: 250g •Display: Digital screen showing speed and battery level Fan Function: •Press the fan button once to turn on the fan at level 1; the display shows "20". •Press the fan button again to cycle through 20 / 40 / 60 / 80 / 100, then turn off. Cooling Function (Only Works When the Fan is On): •Press the cooling button once to activate the cooling function; the green snowflake icon on the display lights up. •Press the cooling button again to turn off the cooling function; the green snowflake icon disappears. •Supports simultaneous charging and operation while plugged in. Charging and Battery Display: •When the charging cable is inserted, the display lights up, and the "%" symbol blinks slowly, indicating normal charging. •When fully charged, the display shows "100%" with the "%" symbol remaining steady. •When a button is pressed, the display first shows the gear level, then returns to the battery display after 3 seconds, increasing by 5%. •When the battery level drops below 10%, the percentage on the display starts blinking slowly; at 0%, the device shuts down. •If the battery is at 0%, turning on the device will only display "00", blink slowly 5 times, and then shut down without activating any functions. •When charging and powered on, if a button is pressed, the display first shows the gear level, then returns to the battery display after 3 seconds. Package included: •1 x Handheld Fan •1 x Data Cable •1 x English and Chinese Instruction Manual