... operation channel, 16,automatic frequnency hopping 3.Rated voltage, 1.5V/3.0V 4.Rated current, 12-20mA System ... memory,no recoding is needed after battery replacement.3.Intelligent Power-saving technology,the service life of ... -1200dpi-1600dpi e cursor speed adjustable.8.Shortcut button can be used to browse the Internet or ... wake it up,press the right or lefe button.5.Never waste the battery and will it ...