Adesso Compagno X Bluetooth Keyboard with Universal Case Stand for Windows 8 and Android, Aluminum (WKB-1000XB) Keyboard: Layout 84-Key US layout Connection: Bluetooth 3.0 wireless technology (also backward compatibility with 2.1, 2.0, 1.2 & 1.1) Working Range: 30 feet (10M) Battery: Built-in Li-ion Polymer Rechargeable Battery Battery Life: Up to 100 hours (continuous use)/ Up to 30 days (standby mode) Indicators: Bluetooth, Caps Lock, Charging & Low Battery Fashionable Protective Adesso