Our new USB cooling fan option can be found here: https://www.etsy.com/listing/1135042409 Assembled and ready to use. 4xAAA battery powered fan kit to help with staying cool and reduces fogging. You can also turn the fan kit on and off with a remote as well as adjust the airflow speed with the optional controller add on. *If you would like to control the fan kit with a remote please select the "+Controller" option. Great airflow with low sound. (Please allow a few seconds to reach full speed.) The battery holder has a mini on/off toggle switch. *For best results, please use a lithium type battery. Available as a single fan kit or a dual fan kit. Option #1 (side blower type). Fan measurement 50x50x15mm. Speed rated up to 5000rpm. Please allow a few seconds to reach top speed Option #2 (front blower type). Fan measurement 40x40x10mm. Speed rated up to 5000rpm. Please allow a few seconds to reach top speed. (Recommended when installing to ensure there is adequate clearance space behind the fan which will help the fan airflow). *Measurements are approximate. Battery holder dimensions are 2.5 x 1.9 x 0.5". Black connector segment is about 10mm. *4 AAA battery is not included. *Controller option* This option is available if you would like to be able to turn the fan kit on and off with a remote. The remote also has adjustable speeds for your fan and is incredibly useful such as for those days when you need to adjust the air flow. Please view the image showing the remote for instructions. *Please note* Controller can create additional sound depending on settings used. Recommended to turn off at the battery holder when no longer in use for prolonged periods of time to fully conserve battery, as turning off with the remote is a sleep mode. This is a made to order product and the visual appearance may vary slightly from the images shown.