Sanwa Direct Solar Keyboard, Bluetooth, with Numeric Keypad, Quiet Operation, Japanese Layout, Multi-Pairing, Compatible with iOSAndroidMacWindows,

This solar-powered wireless keyboard can be charged using indoor lighting. It can be charged using any indoor lighting, even without sunlight, eliminating the need for replacement or recharging. (Note: Charging requires a minimum of 200 lux of light (equivalent to 200-500 lux in a typical office or living room).) The solar panel charges a storage capacitor. If the power runs out, the keyboard switches to operation using the backup button. It uses an electric double-layer capacitor (supercapacitor) for storage. It is resistant to repeated charging and has a longer lifespan than lithium-ion capacitors. It has a built-in backup button that can be used in dark environments where the solar panel does not receive sufficient light. It automatically switches power off when solar charging is complete. It features a pantograph keypad that allows for shallow keystrokes and light touch input. Its high rigidity and minimal key sink allow for a comfortable typing experience. This full Japanese keyboard with a numeric keypad is perfect for both the office and home. It has 113 keys and convenient shortcut keys for volume adjustment and screen brightness control. Compatible with multiple operating systems. Can be used wirelessly with a variety of devices, including Windows, Android, macOS, and iOS. Supports multi-pairing with up to three devices, allowing you to switch between devices with the push of a button. Includes a stand on the back that can be adjusted to an angle. Warranty period: 6 months from the date of purchase