Visenta Lambeth 2.4 Ghz wireless laser mouse with Adjustable sides for various hands 2.4 Ghz anti interference wireless laser mouse with variable DPI settings from 800-1200-1600-2000. Adjust the cursor speed as per your needs. 4 Different adjustable side options, replace the sides as per your hand size. 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 Tru-Wave technology provides precise, smart cursor control over many surface types. Visenta Co-Link technology - after pairing there's no need to re-establish pairing after a signal loss or shutdown. Works with Windows 2000, XP, Vista, 7, 8, and 10. Two year warranty, simply get a replacement if it stops working within 2 years.