product feature 1:2.4g wireless mouse , 2:build in mini receiver, 3:10m oprating range Product specification:1.2.4GHz digital wireless transmission,operation distance is up to 10 meters.2.built-in mouse memory,no recoding is needed after battery replacement.3.Intelligent Power-saving technology,the service life of one alkaline battery is up to six months4.Intelligent connectivity,no need to code, ...