Features: 1. Ergonomic design can reduce typing fatigue, Foldable design makes the keyboard stylish and practical. 2. It makes travelling and outdoor document processing easier. Mute design makes typing quiet and comfortable. 3. This ultra-slim folding mini keyboard is pocket-sized and lightweight, easy to carry, perfect for travel or business trip, etc. 4. Easy on / Easy off: Open the keyboard to connect to your tablet or smartphone. Simply close the keyboard to shut it down. 5. Compatible with 3 major operating systems: for iOS / Windows/ Android. Supports most Bluetooth-enabled smartphones and tablets. 6. Could easily paired and connect both your wireless device and your PC with the keyboard simultaneously and switch between them with ease. 7. The low-profile whisper-quiet keys bring a whole new level of natural to your fingertips, offer you a silent and comfortable typing experience. Specification: 1. Working Voltage: 3.0-4.2V 2. Product Size: 15.5x8.5x1.5cm 3. Material: ABS + Aluminum Alloy 4. Bluetooth Version: Bluetooth 3.0 5. Effective Distance: Within 10 meters 6. Support System: iOS, Android, Windows Note: 1. Size may be a little deviation due to manual measurement. 3. This Bluetooth keyboard is not compatible with any kinds of computer sticks. What's in the box 1 x Bluetooth Kerboard 1 x User Manual 1 x USB Cable