User`s manual
Page 13
Operating Tips & Trouble Shooting
• Optical mouse works best on non-reective, non-white, surface.
If cursor movements are lagging, placing the mouse on a mouse
pad will help. Darker surface requires more energy to operate thus
consumes more battery power.
• If you will not use the keyboard and mouse for a long period
of time remove the batteries from the respective battery
compartments.
• When the keyboard and/or mouse behave erratically it may be
an indication that the battery power is low. Follow the instructions
in Charging the Batteries section to recharge the batteries if
necessary. The keyboard and mouse are functional during charging.