Excerpt from the manual for an LG/WINGCOM Wireless Keyboard and Mouse:

-Product Concept

WING MOUSE and WING KEYBOARD is specially designed for the people who need extreme freedom from every cord products. And it is specially designed by the most people. WINGCOM CO. LTD is trying to make better products, and trying to be a specialist of cordless product, and later, WING MOUSE and WING KEYBOARD will be a standard of cordless products.

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-Installation of reciever unit

Put 2 AA batteries in WING MOUSE. If mouse does not work, remove batteries and put again after 10 seconds. If it does not work after 2 or 3 times trial, check battery.

Put 2 AA batteries in WING KEYBOARD. If keyboard does not work, remove batteries and put again after 10 seconds. If it does not work after 2 or 3 times trial, check battery.

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-Cleaning mouse ball

For smooth and correct movement, cleaning is important like car. 1. Open ball cover from bottom side of mouse 2. Take out ball from mouse 3. Remove dust from ball with velvet or soft cloth 4. Remove dust from roller with thin alcoholic cotton stick 5. Put ball in mouse and close ball cover 6. Remove dust from foot with soft toothbrush