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WiFi range (in meters): 10 meters Keyboard SilentTouch Technology Adjustable keyboard height Spill-resistant design 2.4GHz wireless (10 meters) Nano USB receiver Caps lock indicator light On/Off power switch 2 AAA batteries（Alkaline Battery） Mouse SilentTouch Technology Contoured compact shape Smooth, responsive cursor control On/off power button 1 AA batteries (Alkaline Battery）