1. [Compact] The keyboard is compatible with the Infinix Hot 40 Pro FREE FIRE. At only 3/16 of an inch, the SlimKeys Bluetooth Keyboard is ultra-thin and ultra-light! It has a convenient size for storage. When it's time to type a long text message, email, or article, you can quickly and easily restyle it! Please note that the INFINIX HOT 40 PRO FREE FIRE device is not included2. [Lightweight] The SlimKeys Bluetooth Keyboard's responsive chiclet-style keys are large enough for the same tactile touch typing you'd find on a full-size keyboard, but thin and light enough to take with you! 3. [Power Saving] The Slimkeys Bluetooth Keyboard's on/off switch lets you turn the keyboard off to save battery when not in use. Its advanced Bluetooth 3.0 version is also designed to avoid the battery drain that comes from leaving older Bluetooth versions on all the time4. [Bluetooth Version 3.0] Bluetooth Version 3.0 is the latest in keyboard pairing technology! This means faster pairing and smoother communication between your device and the SlimKeys Bluetooth Keyboard!