Mini Wireless Bluetooth Keyboard for iPad iPhone 4 Laptop Computers, Black

# Battery Duration: Constantly use: about 50 hours
# Charging time: 3 - 4 hours.
# Dimensions (L X W X H): 115 (H) X 60 (W) X 7 (H) mm.
# RF output power: 4dbm maximum.
# Operating Range: Up to 33 feet (10 meter).
# Technical Details: Receiving sensitivity: -75dbm (standard).