Support multiple systems: The Bluetooth keyboard connects seamlessly with iOS, Android, and Windows. Maintains a stable connection and quick response device within 10 meters of operation, suitable for multiple Bluetooth devices Pocket size & easy to use: Only 5.97 ounces, the palm-sized keyboard can be folded into a pocket or backpack to carry. Just press the connection button to quickly pair with your device. The automatic on/off and reconnection design makes operation more convenient Classic style & rechargeable battery: Portable design, modern style. Its excellent touch and simple appearance make it perfect for your laptop and desktop. The built-in lithium battery has a long battery life. A full charge can complete a short business trip or vacation Specifications: Operation range: 10m Bluetooth: 5.2 Supported systems: iOS/Android/Windows Lithium battery capacity: 210mAh Standby time: >150 days Modulation mode: GFSK Continuous operation: ≥30 hours Charging time: <2 hours Key life: >3 million times Standby current: 0.3mA Operating voltage: 3.0-4.2V