Manufacturer: Logitech. With automatic backlighting and hand proximity detection this sleek, comfortable keyboard delivers a brilliant typing experienceday or night. Type easily, even in the dark with brightly backlit keys that provide precise illumination. Only the characters are illuminated, so you can see just what you need to see without distraction. The keyboard automatically adjusts the backlighting to suit the lighting conditions. You can also adjust it the way you like it with the press of a button. Sensors detect your hands as they approach the keyboard to turn the backlight on and off. The PerfectStroke key system distributes typing force evenly across key surfaces, making every keystroke comfortable, fluid, and whisper-quiet. Durable concave keys position your fingers properly, and their softly rounded edges invite your fingertips to glide from key to key, hour after hour. Fast, easy recharging means you simply plug in the universal micro-USB cable for three to six hours for full charge. You can even type while it’s recharging. The tiny receiver stays in your laptop. Plus, you can easily add a compatible wireless mouse or keyboard without the hassle of multiple USB receivers. you can work or play in more places like your comfy couch, the long-range wireless connection virtually eliminates delays, dropouts, and interference. An on/off switch helps you go longer between charges, while power indicator lights eliminate surprises. With a full-size layout all the keys are right where you’re used to so you can type quickly and comfortably.