Eye Design Digital Hygrometer & Thermometer Eye Design Digital Hygrometer & Thermometer with LCD display to measure the humidity and temperature of your environment. This is an essential tool to for every lash artist to ensure that their work environment is within the recommended range of humidity and temperature for an optimal eyelash adhesive/ glue application. Eyelash glue requires a room temperature of 18° - 24° and 50% - 80% humidity for an effective application and prolonged retention. Battery not included. Explore our Lighting & Photography collection to see more best-selling items from Eye Design Professional and don't miss out on our great deals today. Features: Adjustable 12 hour/ 24 hour display system. Dimensions: 105 x 98 x 20mm / 4.13 " x 3.86" x 0.79 "(approx.) Main/background colour: white | font colour: black Temperature range: -50°C - 70°C（-122°F~ + 158°F） Humidity range: 10% - 99% RH Power supply: 1 x AAA 1.5V
