1、19inch widening and processing, there are more buttons and wider buttons with a better user experience. 2、Portable and ultra‑thin, it is very convenient for you to carry it on trips or business trips. 3、The brushed metal texture keyboard panel is non‑slip, giving people a high‑end feel. 4、Light weight, quiet keyboard, waterproof, dustproof, scissor keyboard, fast typing and good hand feeling. 5、The keyboard can be used with smart phones, tablets, laptops, and desktop computers. 1 x Keyboard1 x Charging Cable Item Type: Wireless Bluetooth KeyboardBluetooth  3.0: Standard MICR InterfaceWithin 10 Meters: Effective Operation Can Be AchievedModulation Method: GFSKWorking Voltage: 1.8~ 3.6VWorking Current: < 2.0mAStandby Current: 0.3~ 0.5mASleep Current: <40UACharging Current: ≥200mAStandby Time: >30 DaysCharging Time: <2 HoursBuilt-in Lithium Battery Capacity: 110mAhSustainable Working Hours: 44 HoursButton Force: 80±10gButton Life: 5 Million ClicksWorking Temperature: -10~55 Degrees