Home RF Wireless Bulgarian Touchpad + mouse buttons Windows keys Black Keyboard On/off switch Yes Noise level 55 dB Frequency band 2.4 GHz Purpose Universal USB hub No Windows keys Yes Keyboard keys operating life 5 million characters Numeric keypad No Pointing device Touchpad + mouse buttons Keyboard language Bulgarian Device interface RF Wireless Connectivity technology Wireless Recommended usage Home Design Surface coloration Monochromatic Product colour Black Wrist rest No Keyboard style Straight Backlight No Features Plug and Play Yes Wireless range 10 m Power Number of batteries supported 2 Battery type AA Service life of battery 18 month(s) Power source type Battery Mouse Mouse battery life 18 month(s) Mouse battery type AA Mouse included No System requirements Other operating systems supported ChromeOS Mobile operating systems supported Android 7.0, Android 7.1, Android 7.1.2, Android 8.0, Android 9.0, Android 10.0, Android 10 Windows operating systems supported Windows 10, Win