CSD-1104-20 is engineered for long-term storage of 20%~50%RH. The circulation of air in the cabinet is regulated by an internal fan. Hygrometer is battery operated. Specifications: 1. Humidity Range: 20%~50%RH adjustable by digital panel) 2. Sensor accuracy: ±5%RH 3 .External dimensions:  (W x H x D) 1200 x 1840 x 670 mm 4. Internal dimensions:  (W x H x D) 1190 x 1560 x 620 mm 5. Weight: 160 kg 6 .Capacity: 1160 L 7 .Shelves (W x D): 5 pcs, 1157 x 490 mm, adjustable 8 .Max weight on shelf:100 kg 9 .Structure: 1.2mm Steel, 10 .Cabinet color: Gray 11. Door: 4 pcs, with handles, airtight magnetic sealers and glass..  12. Voltage: 220 V AC (110 V AC optional) 13. Power consumption: Ave. 28W/h； 14. Castors: 4pcs, 2 of them with brakes  15 Performance of CSD-1104-20