With Its Ultra-Slim Design And Compact Size, The Arteck 2.4G Wireless Keyboard Easy Setup: Simply insert the nano USB receiver (stored inside at the back of the keyboard) into your computer and use the keyboard instantly. Compact design: Scissors X structure gives you the comfortable typing experience, low-profile keys offer quiet and comfortable typing. Long Battery Life: Energy-saving design and automatic sleep mode allow up to 4 months between battery changes. (based on 2 hours¡ non-stop use per day) (2 X AAA batteries included) Ultra Thin and Light: Compact size (11.12 X 4.7 X 0.2in) and light weight (7.65oz) but provides full size keys, shortcuts for comfortable typing. Package contents: Arteck HW098 USB Wireless Keyboard, nano USB receiver, 2 X AAA batteries, welcome guide, our 24-month warranty and friendly customer service.