Acer 21.5" All-in-One NVIDIA Tegra K1 2.1GHz, 4GB RAM, 16GB - DC221HQ cwmircz (Certified Refurbished) This Certified Refurbished product is certified factory refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty. Active Matrix TFT Color LCD Bluetooth 4.0 3 USB Ports , HDMI microSD