Hello Mutley2007. Thank you for your feedback on our Tim fan. Tim does not have a timer setting but is equipped with a USB cable for mobile use and an adapter for home use. Connected to an external battery pack, Tim always provides fresh air. If you have any further questions, please feel free to contact us directly at service@stadlerform.com or by phone at 041 720 48 48. Kind regards from your Stadler Form Team

As far as I know, the fan does not actually have a timer...