Ergonomic comfort, wireless design Work in comfort all day with our premium wireless ergonomic mouse. Navigate precisely and access your most-used features with two programmable buttons. All-day comfort Ergonomic design promotes neutral hand position. Long battery life Holds a charge for up to 15 months. Connect up to three devices And switch seamlessly between them.2 Natural hand position Featuring a soft, easy-to-grip thumb rest for added comfort. Smooth and precise Machined aluminium scroll wheel, Teflon base and precise tracking sensor allow for easy navigation on a variety of surfaces. Light, durable design Featuring seamless finishes, in a variety of colours Tech specs Connection interface Bluetooth® Low Energy compatible 4.0 / 4.1 / 4.2 / 5.0 Wireless frequency 2.4 GHz frequency range Wireless range 30 feet (10 metres) in open area; up to 15 feet (5 metres) in typical office environment Compatibility Microsoft Windows 10 / 8.1 Device must support Bluetooth® 4.0 or higher Dimensions 4.65 x 3.00 x 1.67 in (118.2 x 76.3 x 42.4 mm) Weight 3.21 oz (91 g) (including batteries) Battery 2 AAA alkaline battery (included and pre-installed) Battery life1 Up to 15 months1 Colours2 Pastel Blue, Matte Black, Glacier, Peach Warranty3 1-year limited warranty