... and good material 3.waterproof,dust proof.dampproof. wireless mini multifunction keyboard for table pc Details:Made of 100% ... laptops, Laboratories, military and marine operations, industrial environment.Characters:Keyboard Dimensions: 500mm(L)× 135mm(W)× 7mm(HWeight: <200g Keys ... : Standard (109 keys or 85 keys) Keyboard Interface: USB Operating temperature fixed: -40 ~ 80 °C ...