Wired 19 Keys Numeric keypad with 3-Color RGB BacklightPlug & PlayProfessional 18 full-size and concave keysUp to 10 million times keystrokeWaterproof and non-slip design 3 Color Backlight - Red / Blue / Purple or No BacklightCompatibility: Windows 7/8/9/10/ XP/ Android / iMacProduct size:160 x 95 x 31 mmChange the RGB backlight colors: “TAB” + “BACK SPACE"Intendity backlight: “TAB” plus “+” / “TAB” plus “-”