Wireless optical mouse with 3 buttons and a scroll wheel. The mouse has a sensor with a sensitivity of 2400 dpi. Designed for home and office use. Wireless mouse allows for comfortable use without a cable. Compatible with Windows 98/ME/2000/XP/Vista/8/10 operating systems. Properties: Sensor: Optical Number of buttons: 3 Number of rolls: 1 Profile: Universal Resolution (max): 2400 dpi Connection: Wireless Interface: USB Power supply: AAA batteries/rechargeable batteries Button under the roller: Yes