Rapoo E9070 2.4G Wireless Ultra Slim Keyboard, Black The world's thinnest keyboard with thinnest edge only 5.6mm. Thin-and-strong hairlines stainless steel transpires feel of style and comfort Scissor-type key system: A perfect touch and reaction, making every keystroke natural, smooth and correct 2.4G 10 meters two-way wireless transmission technology keeping interference away from other bluetooth and Wi-Fi channels One key(Fn) switch between multimedia/function keys gives quick access to functions as media player, homepage and volume adjustment, etc Advanced low power solution provides long battery life for up to 24 months