Features & details Solar-Powered Keyboard: No battery hassle or cable charging hassle. Any light source keeps your keyboard recharging while working or not working. Long Battery Life: Even in total darkness without any light, the full rechargeable battery will last for 6 months. (based on 2 hours working per day) Easy Setup: Simply insert the nano USB receiver into your computer and use the keyboard instantly. Ergonomic Design: Stainless metal with paint front panel gives the heavy duty feeling, low profile keys offer quiet and comfortable typing and functions keys, arrow keys and number pad provide easy work. Package Content: Arteck Solar 2.4G Wireless Keyboard, nano receiver, welcome guide, our 24-months warranty and friendly customer service.