TeckNet Classic 2.4G Portable Optical Wireless Mouse with USB Nano Receiver for Notebook,PC,Laptop,Computer,6 Buttons,30 Months Battery Life,4800 DPI,6 Adjustment Levels Plug and play: 6-level adjustable DPI settings (800/1200/1600/2400/3200/4800) to meet your multiple needs, either for daily work or gaming. Ultra-Durable Build: 5,000,000 clicks lifespan. 2.4GHz Wireless provides a powerful, reliable connection, increases working distance of up to 50ft (15m). USB Nano Receiver can be stored within the back of the mouse. TeckNet TruWave technology: Provides precise, smart cursor control over many surface types. TeckNet CoLink technology: Once paired theres no need to re-establish pairing after a signal loss or shutdown. 30-Month Long Battery Life: With Auto power-off function, On/Off switch, Smart sleep mode and battery life indicator, you might just forget this mouse runs on batteries. Features a battery level indicator: Never be surprised by low battery power again. The LED battery indicator warns you if the charge is running low.