Fanless external power supply option.Fanless external power supply option for quieter operation.Digital Alert Systems part number NONOISE-PS.DAS Fanless external power supply option (NONOISE-PS)SKU: NONOISE-PS$495.00PriceExcluding Sales Tax | Shipping PolicyQuantity*Add to CartBrandDigital Alert SystemsProduct DetailsManufacturer: Digital Alert SystemsManufacturer part number: NONOISE-PSSold by: Radio Gearheads, 705 Eaton Ave N, Fosston, MN 56542 Questions about compatibility, licensing or lead time? Call 1-800-992-1506 or use Get A Quote.