HP Ultra-slim Expansion Base. Connectivity technology: docking. Optical drive type: DVD±RW. Weight: 0.72 kg, Width: 230.3 mm, Depth: 268.4 mm. Operating temperature range (T-T): 10 - 30 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 5 - 95 %. Size: 230.1 mm (9.06 ")