INVERSE Wireless 19 Keys Numeric Keypad Mini Keyboard for Mac & Laptop PC Number Pad Specifications: Number of Keys: 19Keys Interface:Wireless 2.4G Voltage: DC1.5V Color: Black Key Life: More than 10 million times OperationRange: 10M (Without signal disturbance and no direction limit) Power: 1*AAABattery (Not Included) Package: 1pcs *Wireless Numeric Keypad 1pcs * USB Receiver(*PackageWithout Battery)