The Lenovo 800 Self-Charging keyboard runs entirely on light, with a solar cell collecting energy and a supercapacitor holding onto it. It works with sunlight, indoor lighting, or whatever you've got around, so you don't need batteries or cables at all. You can pair it with up to three devices using Bluetooth and switch between them whenever you need.Good to know- A full charge lasts up to one month, so you can type without thinking about power- There's a USB-C port for emergency charging if you ever need it- Spill-resistant design and adjustable tilt legs make it practical for everyday use