Asus R558UR is a very good laptop.it has a 15.6-inch screen and it has a 4gb ram and 1 tb hard disk.its 2.3 kg normal weight.its hardware paltform is DOS and Operating System is DOS.ASUS X series laptops feature a Li-Polymer battery that gives you up to 700 charge cycles — 2.5 times the lifespan of standard Li-ion cylinder batteries.ASUS X series gives you a wide array of connectivity options that include USB 3.0 Type-C, HDMI and VGA ports, a 3-in-1 SD/SDHC/SDXC card reader and more to ensure compatibility with various peripherals and devices.Typing is now more comfortable than ever with the X series’ full-size one-piece chiclet keyboard