Specification: Material: Aluminum alloy + PC plastic Support System : For OS , iOS, Number of keys: 34 keys Wireless / BT Solution: US BCM 20730 chip BT version : Bluetooth 3.0 Keyboard life: (keystrokes) 5 million times Response rate: 5 ms Wireless / BT transmission distance: 10m Operating current / voltage: 2mA / 3.7V Charging time: 2 hours Continuous use time: about 50 hours Standby time: >160 H Features: 1. The United States BT 3.0 chip, ultra low power consumption. 2. Multi-system compatibility. 3. Scissors foot key cap structure design, feel comfortable. 4. Fast rebound rate and low latency. 5. Ultra-thin design, lightweight, easy to carry. Package List: 1 * Keyboard 1 * Instruction Manual 1 * Data Cable Multi-system compatibility. The United States BT 3.0 chip, ultra low power consumption. Scissors foot key cap structure design, feel comfortable. Fast rebound rate and low latency. Ultra-thin design, lightweight, easy to carry.