Acer wired Full-size standard QWERTY layout with an integrated numeric keypad.Key Type: Membrane switches with silent/quiet typing action.Durability: Rated for an operating life of up to 5 million keypress characters.Backlight: None.Dimensions: Approximately 380 x 140 x 25 mm (15" x 5.5" x 1").Weight: ~480 grams (16.9 oz).