TeckNet Bluetooth Wireless Mouse, Grey (BM308) Connects directly to Bluetooth-enabled device laptop computer or PC without the need for a receiver. Up to 24-Month Battery Life with Battery Indicator light TruWave technology for precise, smart cursor control over many surface types. 5 DPI Selection: 3000/2000/1600/1200/800 Works with Bluetooth-enabled computers running Windows 2000, XP, VISTA, 7, 8, 10, like Surface Pro, Windows computer, notebook, laptop, computer, Chromebook and etc. Ergonomic contoured shape provides all-day comfort. Battery: 2 x AA size battery (NOT INCLUDED)