This Casella CEL-712 Microdust Pro Real Time Dust Monitor Kit is in excellent condition and is guaranteed to be functional with a 30-day return policy. This unit came from a local lab that had surplus lightly used equipment. We urge customers to view all photos as they show overall condition, included accessories and useful information. Listing only includes what is shown in photos. We will be happy to provide additional information as well as photos so please feel free to contact us with any questions. The Casella CEL-712 Microdust Pro is a rugged, handheld, data logging instrument for the real-time detection of airborne dusts, fumes and aerosols. Real-time graphical display of dust levels Simple icon driven user interface Extensive range: 0.001mg/m3 to 250g/m3 (Auto-ranging) Unique removable sampling probe Rugged design for harsh environments Multi-language operation For additional information please copy and paste link to manual below: https://casellasolutions.com/product_support/airsampling/microdustpro/CEL-712%20Microdust%20Pro%20Handbook%20HB4048-02%20ENGLISH.pdf If link is no longer available, please contact us for copy of PDF