This fan needs to be in your lash stash. If at anytime your client has accidentally opened their eyes or has ANY stinging from adhesive fumes your fan can be used to help with that. A fan is recommend to use at the end of the lash appointment before the client opens their eyes to rid any fumes. With 3 speeds low, medium, and high, it is sure to suit you. The fan is rechargeable and comes with the usb cord. Also included is a stand to hold your fan.