AUTO-COOLING: External USB Power Cooler for Nintendo Switch Docking Station. The LED screen displays the air temperature from your laptop vent. so you can keep track of your console's temperature.FAST HEAT DISSIPATION: The cooling fan keeps your Switch cool in the original dock, enough to keep the temperature down. Heat dissipation is so effective that You can play games with your device for longer periods without fever.SELECTABLE AIRSPEED: The fan speed can be adjusted, please choose the appropriate fan speed. The rotational speed is adjustable from 600rpm to 6000rpm, Great for cooling and ventilation. Three simple control buttons: increase, decrease, onoff.SPONGE PROTECTION: Our cooling fan package includes a USB cable that you can plug into the Nintendo Switch docking station to access power. The sponge on both sides of the cooling fan not only acts as an anti-slip but also prevents your Switch from getting scratched.PORTABLE: This radiator for Nintendo Switch's compact and lightweight design makes it easy to carry and pack into backpacks. It's also simple to use, with no complicated installation steps.