Details The perfect accessory to complete your workspace. Featuring a full keypad with number lock; the Wireless Numeric Keypad is a great wireless solution for extending your existing keyboard. Not only accountant; every notebook or laptop pro will become dependant on the numeric keypad once you have tried it! Use it; you will find your work effciency and productivity will be improved greatly! Specification - 1.Operating Frequency - 2.4G technology2.Structure Fixed way - Fastening buckle bit3.Case Material - ABS4.Power Supply - 1* AAA Battery (Package not include)5.Operating Current - 5mA (MAX)6.Sleep Current - 0.5mA7.Effective Distance - Approximately 32.9FT (10M) Accessibility8.Working Temperature and Humidity - 5-50 celsius 10%-85%RH 25celsius9.Storage Temperature and Humidity - -20-70 celsius 5%~95% 25 celsius10.Application - Desktop; Laptop; Tablet11.Key Mechanical working life - The keycaps life of more than 10 million times Package List - 1 x 2.4G Wireless Numeric Keypad Black 1 x Wireless USB