Perfect tool to optimize your work environment! After all, temperature and humidity conditions directly affect drying and curing speed of your favorite PremierLash Lash Adhesive. Cyanoacrylate Adhesive required humidity (RH) to dry; too much or too little humidity can affect the dry time. Reducing humidity can slow down dry time, or conversely increase dry time by increasing humidity/temperature. The PremierLash Lash Hygrometer measures temperature (in °C or °F) and humidity Display provides 24 hr history min/max humidity & temperature to fine tune your work environment