Measure the temperature and humidity in your room. 
This will help you gauge how to adjust the use of your lash adhesive, depending on whether the temperature and humidity are high or low. 
If you want to learn more about Lash Adhesive and adjusting your techniques to suit different working environments - we recommend checking out The Lash Adhesive Bible, available on our website as an eBook or Hard Manual. 
AAA Battery required - not included. 
Measures - 9.1cm wide x 10.1cm high