Function of the key when num lock is off Press Number 1 to End, Press Number 2 to Down Press Number 3 to PgDn, Press Number 4 to Left Press Number 6 to Rght, Press Number 7 to Home Press Number 8 to Up, Press Number 9 to PgUp Press Number 0 Ins, Press "." to Del If you just wish to use the number function, keep num lock on Specifications: Style?Modern Keys: 27 keys Color: Black Keyboard Description?Wireless Connectivity Technology?Wireless Compatible Devices?Laptop, PC Weight: 89 g Product Size: 5.5 x 4 x 0.6 inches Package Dimensions?5.94 x 4.33 x 0.94 inches Item Weight?0.29Ib Manufacturer?Numeric Keypad Package Includes? 1 x Wireless Numeric Keypad, 1 x USB Receiver