RH Level : < 20% External dimensions : (W x H x D) 40 x 69.2 x 43.7 cm Internal dimensions : (W x H x D) 36 x 59.7 x 35.7 cm Doors: Anti-Static Glass Shelves : 2 Anti Static Shelves (Adjustable Height) Load Capacity per Shelf : 20kg Volume : 93 litres Average Power Consumption: 20W Hygrometer : TESTO Digital thermo-hygrometer ESD safe shelves/body : Yes ESD safe casters/stands : Yes 1 Meg ohm Ground Wire : Yes Recovery Time: Recovers to ≤ 20% RH within 30 minutes after accessing door for 30 seconds or less.