mechanical keyboard havit backlit wired gaming keyboard extra-thin & light, kailh latest low profile blue switches, 87 keys n-key rollover (black) havit <b>kailh low profile blue switches, makes the extraordinarily thin and light design of mechanical keyboard possible.</b><br> <br> <b>specification</b><br> size: 354*127.5*22.5mm<br> operating force: 45±10gf<br> key number: 87 keys<br> travel(total): 3.0mm <br> interface type: usb<br> net weight: 520g<br> voltage: 4.75v±10%<br> current: ≤ 50ma (no backlight),≤ 250 ma (brightest backlight)<br> cable length: 1500mm (black usb cable)<br> service life: >50 million key operation<br> fully compatible with: win10/8/7/vista/mac/linux/ibm pc<br>