Features: 1.The United States Broadcom BT 3.0 chip, ultra low power consumption. 2.Multi-system compatibility. 3.Scissors foot key cap structure design, feel comfortable. 4.Fast rebound speed and low latency. 5.Ultra-thin design, lightweight, easy to carry. specification: 1. The United States Broadcom BT 3.0 chip, ultra low power consumption. 2. Multi-system compatibility. 3. Scissors foot key cap structure design, feel comfortable. 4. Fast rebound speed and low latency. 5. Ultra-thin design, lightweight, easy to carry. : Material: Aluminum alloy + PC plastic Support System : For Mac OS Windows, iOS, Android Number of keys: 34 keys Wireless / BT Solution: US Broadcom BCM 20730 chip BT version : Bluetooth 3.0 Keyboard life: (keystrokes) 5 million times Response speed: 5 ms Wireless / BT transmission distance: 10m Operating current / voltage: 100mA / 5V Charging time: 2 hours Continuous use time: about 50 hours Standby time: >160 H Package List: 1 * Keyboard 1 * Instruction Manual 1 * Data Cable