About this itemPremium brand Alkaline batteryHigh speed optical mouse with speed selection buttonKeyboard: Dimension: 2.8 cm (H) x 44.1 cm (W) x 15.4 cm (D) (W/O stand). Mouse : -Dimension: 3.7 cm (H) x 6.3 cm (W) x 10 cm (D)Smooth scroll wheel with 3 changeable speed3 button hand-friendly mouse designA sturdy built with special chocolate key topsCountry of Origin: China2.4GHz wireless deskset. Smart semi multimedia keyboard. Changeable speed: 800 / 1200 / 1600 CPI for mouse. Switch Life: 5 Million life cyclesStorage space under the Keyboard and inside the mouse for the Nano USB receiver ; Mouse and the keyboard work with the single nano USB receiver only.Product informationTechnical DetailsBrand‎IBallManufacturer‎iBall, 87, Mistry Industrial Complex, MIDC Cross Road "A" Andheri (E), Mumbai 400 093. Maharashtra India Toll free No. 18002666409Series‎Magical Duo2Colour‎BlackItem Height‎28 MillimetersItem Width‎44.1 CentimetersProduct Dimensions‎15.4 x 44.1 x 2.8 cm; 586 GramsBatteries‎1 AA batteries required. (included)Item model number‎Magical Duo 2Power Source‎Battery PoweredOperating System‎Linux, Windows Vista, Chrome OS, Windows 7, Raspberry Pi OS, Mac OS, Windows 2000, Windows 10Are Batteries Included‎YesIncluded Components‎Keyboard, Mouse with USB receiver, 2 X AAA size and 1 X AA size Alkaline batteriesManufacturer‎iBallCountry of Origin‎ChinaImported By‎Best IT World (India) Pvt LtdItem Weight‎586 g