Savoy Humidification devices employ a specially designed, highly absorbent sponge capable of providing ample humidity in a wide range of humidors. Accurately monitor the temperature and humidity in your humidor with a Savoy Hygrometer. The straightforward gauge takes a simple watch battery and is easy to read. Conveniently mount the humidifier and the hygrometer on the interior of your humidor or the underside of the lid.