Check the listing for details. Stretto Humidifier & Hygrometer for Large Instruments. Condition: New. Listed at 53.87 USD. DescriptionThe Stretto® Humidifying System is designed specifically to maintain optimal humidity for fine stringed instruments during periods of humidity changes. Humidifier slowly releases moisture over the course of up to two weeks. Digital hygrometer accurately measures temperature and humidity levels. Humidifier: Plastic aerated case encloses a Stretto® bag that quickly absorbs water. Simple to use, Velcro attachment, convenient size fits in almost any case (Cello 115 x 95 x 15 mm).Hygrometer: Large display indicates temperature and humidity simultaneously. User may select Celsius or Fahrenheit temperature scales, range from +23° F to +122° F (-10° C to +50° C), 0.1° C/F resolution. Humidity measured from 20-99%, 1% resolution. Memory function and internal clock records max. and min. levels. Mounts to case with Velcro, requires one AAA battery (included). Size 75 x 15 x 59 mm. This auction includes:One Stretto Humidifier& Hygrometer for Cello and Large Instruments ALL BUYERS NOTE : Please go to my shipping handling page for finalized combine shipping discount rate and updated shipping information.