Product details of HP 15-da0405TU Intel Celeron Dual Core N4000 1.1GHz, 4GB, 1TB, 15.6 inch HD Laptop. HP 15-DA0405TU Celeron Dual Core N4000 15.6 Inch HD LaptopFeatures· Model: HP 15-da0405TU· Intel Celeron Processor N4000 (4M Cache, up to 2.60 GHz) · 4GB DDR4-2400 SDRAM · 1TB 5400 rpm SATA HDD · 15.6" diagonal HD(1366 x 768) Display.