Features: 27keys Numeric Keypad make working in excel- and constantly on the go- for work or school be exceedingly effortless-. 2.4Ghz wireless transmission signal stable anti-interference,the digital keyboard Support wireless bluetooth-compatible connection function. Simple and practical, the structure of the scissors foot is designed to be comfortable. Drive Free and with more function keys Specifications: Wireless protocol: 2.4Ghz Working distance: about 10meters without obstacles Battery type: 2xAAA battery (Not included) Working voltage: DC3V Working current:2mA Continuous working time: 50Hrs Size:approx 134X105X22MM/5.27x4.13x0.87in Note: Due to the different monitor- and light effect,the actual color maybe a slight different from the picture color. Please allow 2-3cm differs due to manual measurement . Package includes: 1Setx 2.4G Wireless Numeric Keypad