Dell WM123 is a wireless mouse which cost 800rs. Its a three button optical mouse. Give plug and play convenience. Mouse work on cell. Mouse is having good quality. Its give clutter free work work space. Battery consumption is very less which make the mouse to work more than 2 months on single battery. Mouse do come with 1 year warranty. In 800rs Mouse is worth buying. The mouse do come with black and blue colours. look wise mouse is very slim and handy.