Altos are the first personal accessory ensuring that air composition is right for optimal cognitive and physical performance. It is small and light and easy to cary with you everywhere. For me the Altos CO2 monitoring device has helped me having less headaches. You get notified and can easily see on the display and in the Altos app if there is too much CO2 in the air where you are. Then you can do something about it. For example open a window to get some fresh air in, or taking a walk outside to fill upp your brain fuel with new fresh air. So by letting Altos monitor the air around you all the time, you will get both more productive and also more healthy.
You can read more and buy it here.