104-key layout with Large L-shaped Enter key Three Windows keys Low-cost, high-quality center-bearing membrane switch This product meets the European Union RoHS initiatives. Now shipping with Ergo Technology. Most keyboards use a standard 55 grams of force required to register every key, Ergo Technology has 5 different levels of force. From 35 grams to 80 grams - that correspond to the strength of the finger that touches the keys. The result is more comfort for your hands.