Touchpad DPI Adjustable Functions Ergonomic Design, Perfect Shape Scroll Wheel Function Comparable to the Real Notebook Touchpad 92 Keys Build-in Removable Rechargable Li-ion Battery Dual Power Supply Mode Can Be Selected Specifications: Operational Range: up to 10 meters Transmit Power: +5db Max Operation Voltage: 3.3V Operation Current: < 50mA Charging Current: < 300mA Sleep Current: <1mA Color: Black and White Product Dimension: 146.8 X 97.5 X 19 mm(L*W*H) Product Net Weight: 110g Package List: 10 X Mini Wireless Keyboard Combo 10 X Wireless Receiver Adapter 10 X USB A to Mini-B Charge only Cable 10 X User Manual