HP 240 Bluetooth Mouse/Ambidextrous; Compact Size; Portable Mouse/Red Optical Tracking/1600 dpi/3 Years Warranty/Pike Silver (43N04AA)Brand HP Manufacturer HP, HP India Sales Pvt. Ltd. Colour Pike Silver Item Height 2. 9 Centimeters Item Width 6 Centimeters Product Dimensions 10. 7 x 6 x 2. 9 cm; 55 g Batteries 1 AA batteries required. (included) Item model number 43N04AA#UUF Hardware Platform Laptop, Personal Computer Operating System Windows XP, Windows 7 Average Battery Life (in hours) 12 Months Are Batteries Included Yes Included Components Wirelesss Mouse; Quick Start Guide;