HP Pavilion dv7-4173us Phenom II Quad-Core 2.1 GHz diagonal screen size 17.3 inches 1600 x 900 LED-backlit LCD memory 4 GB DDR3 SDRAM hard drive capacity 500 GB 7200 rpm weight 8.19 lb optical drive DVD¡¾RW/DVD-RAM/DVD¡¾R Double Layer LightScribe operating system Windows 7 Home Premium 64-bit frontside bus speed 3.6 GT/s wireless connectivity 802.11b/g/n; Bluetooth network connectivity 10/100/1000 Ethernet webcam with microphone 3 USB 2.0; 1 eSATA/USB 2.0; 1 Ethernet; 1 HDMI; 1 VGA 15-pin D-sub memory card reader ATI Mobility Radeon HD 4250 Graphics with 128MB display cache memory with up to 2045MB total available memory Bluetooth up to 7 hours of battery life