Feature: 1. Made of high‑quality materials, and the wireless keyboard is strong, durable, light in weight, waterproof and dustproof. 2. The keys of this wireless keyboard are quiet, typing fast and feel good, and are easy to operate and convenient to use. 3. Portable and ultra‑thin, and convenient to carry on travel or business trip, and can be used with smart phones, tablet computers, laptops, and desktop computers. 4. Uses a new high‑quality aluminum alloy back cover, and 10in widened and enlarged processing makes people have a better experience. 5. Equipped with TPU silicone soft shell, built‑in a pen slot, has good anti‑drop effect and can effectively protect the keyboard. Specification: Item Type: Wireless Keyboard BT 3.0: Standard MICR Interface Within 10 Meters: Effective Operation Can Be Achieved Modulation Method: GFSK Working Voltage: 3.7V Working Current: <5.0mA Standby Current: 1.0mA Sleep Current: <0.25mA Charging Current: ≥200mA Standby Time: >30 Days Charging Time: <2 Hours Built-in Lithium Battery Capacity: 200mAh Sustainable Working Time: 44 Hours Button Force: 80±10g Button Life: 5 Million Clicks Working Temperature: -10-55℃. Package List: 1 x Wireless Keyboard1 x Protective Sleeve1 x Charging Cable Note: Keyboard with built‑in battery shipped