Feature: 1. Lightweight and sturdy - Aircraft-grade aluminum withstands the rigors of daily travel, excellent typing feel. 2. Compatibility - Use with Bluetooth enabled devices at home or on the go, suited for Windows, Android and iOS. (touchpad unavailable for iOS) 3. Vacation and travel ready - Why bring a bulky keyboard? Maintain business level efficiency working from your smartphone or tablet, saying goodbye to tiny phone screen keyboards. 4. Rechargeable - Work up to 48 hours (560 hours standby) from a single charge with the A18 folding Bluetooth keyboard lithium-ion battery. Specifications: - Bluetooth version: 3.0 - Lithium-ion battery capacity: 140 mAh - Working voltage: 3.7 V - Standby current: 0.25 mA - Working current: less than 3 mA - Touchpad working current: less than 8.63 mA - Working distance: less than 15 m - Button material: ABS - Keyboard layout: 64-key