Feature: 1. Small and portable: Adopt folding design, the body width is reduced to 55mm 2. Aluminum alloy: The keyboard shell adopts aluminum alloy oxidation process, which is durable and high quality 3. Smart switch: Magnetic smart sensor, open the cover to power on the keyboard, close It can automatically sleep on the computer, and Fn+c can turn on Bluetooth pairing, which is faster 4. Universal compatibility: Support IOS, Android, Windows system, suitable for smartphones and lighter tablets Specification: Name: tri-fold aluminum alloy bluetooth compatible keyboard Color: Earth Gold, Space Gray, Rose Gold, Black Main material: aluminum alloy Number of keys: 58 keys Bluetooth chip and version: Bluetooth 3.0 Power supply: built-in 400mAh high-capacity rechargeable lithium polymer battery Working voltage: 3.0~5.0V Key life: 50 million Effective use distance: 10 meters 380mAh lithium battery