TeckNet Classic M002 2.4G Nano Wireless Mouse,6 Buttons,18 Month Battery Life,2000 DPI 3 Adjustment Levels

2.4GHz Wireless - A more secure and precise experience than the traditional FM radio system with an increased working distance of up to 15m
Tiny USB Nano style receiver plugs into your PC and can stay there. DPI button to select your preferred cursor speed; 2000/1500/1000dpi
TeckNet Tru-Wave technology provides precise, smart cursor control over many surface types. TeckNet Co-Link technology - after pairing there's no need to re-establish pairing after a signal loss or shutdown.
Energy Efficient: The auto power-off function switches off the mouse when the USB Nano receiver is disconnected, or the PC is switched off to give 18 months battery life from just one AA battery
Features a battery level indicator, will let you know when power levels are running low