Specification: Condition: 100% Brand New Item Type: Keyboard Material: ABS Number of Keys: 18 Interface: Wireless 2.4G Voltage: DC1.5V Key Life: More than 10,000,000 Times Operating Range: 10m / 32.8ft (No Signal Interference, No Direction Limitation) Battery: 1 x AAA Battery (Battery Not Included) System Support: For Windows 98 / 95 / NT / ME / 2000 / XP / Vista / 7.0 Package List: 1 x Keyboard (Battery Not Included) 1 x Receiver See moreSupports for Windows 98 / 95 / NT / ME / 2000 / XP / Vista / 7.0 systems. The bottom has non-slip pads, which is stable and can be placed on the table. Lasering characters are used on the surface, which is wear-resistant, does not fade, and has a long service life. Adopt U-shaped keycap, high sensitivity, no lag, improve the comfort of use. Support 2.4G wireless connection, no signal interference, no direction restriction, stable performance.