Compare prices on A4Tech F (EN). Find deals Check other offers from A4Tech. Compare prices on all A4Tech Keyboard & Mouse Combos. Prices. Comfortable full-size keyboard and easy-to-carry. mouse with snap-on wireless receiver increase freedom,. so you can work comfortably away. Wireless keyboard set with smart keyboard and optical mouse first-class sensor V-Track. Wireless technology with range up to 10 meters, multifunctional nano.