This W4 Wireless Mouse uses 2.4GHz digital wireless transmission technology, operation distance is up to 10 meters. Built-in mouse memory, no recoding is needed after battery replacement.This ergonomic, wireless laser mouse is perfect for use at home or in the office with any laptop or desktop computer. Description DPI:800-1200-2000 Power Supply: 2 x AAA Battery(Not included) Mouse type: Wireless Optical Mouse Interface: USB Size:112 x 38 x 37mm Gaming optimized 2.4GHz wireless 2.0 connectivity Up to 2400DPI sensitivity 125Hz polling / 8ms response Powered by 2 AAA batteries (not included) Precision 3G laser sensor Tracking up to 100 inches per second Synapse on board memory On the fly sensitivity adjustment 6 high precision hyper response buttons