portable 2.4g wireless digital keyboard usb number pad 18 keys numeric keypad

feature: 100% brand new and operating frequency: 2.4g application: desk lap tablet key mechanical working life: the keycaps life of more than 10 million times system: ios, windows xp, windows vista/7/8/10, usb port specifications: structure fixed way:fastening buckle bit case material:abs color:black modulation:gfsk power supply:1 x aaa battery(not include) operating current: 5ma(max) sleep current: 0.5ma effective distance: approximately 32.9ft(10m)access...