DecaTxt Bluetooth 4.0 one-handed Keyboard that works with iOS /Android /Mac /Chrome & Windows 10 Mobile touch-typing with either hand while walking and keys large enough for most people's fingers. Small as a deck of cards & very light, the ergonomic design provides a break from QWERTY typing Micro USB Rechargeable Battery w/ LED to indicate charging, 4 hour charge can last all Week. Vibrations indicates Cap Lock/Num Lock modes & Pairing. Ideal for Virtual Reality & Accessibilities.