Logitech MK470 Slim Wireless Combo

Mouse
Sensor Technology: High Precision Optical Tracking
Sensor resolution: 1000 DPI
Number of Buttons: 3
Scroll Wheel: Yes- Mechanical
Scroll Buttons: Middle Button
Unifying ready mouse: No
Unifying ready receiver: No
Battery life Mouse: 18 months
Battery type mouse: 1xAA

Keyboard
Battery life Keyboard: 36 months
Battery type keyboard: 2xAAA
Wireless operating distance: 10 m (33ft) 1Wireless range may vary due to environmental and computing condition
Wireless technology: Logitech Nano Receiver