1. [COMPACT] Keyboard Compatible With Ulefone Power Armor 16S. At only 3/16th of an inch, the SlimKeys Bluetooth Keyboard is super thin and light! It has a convenient size for easy storage. When you need to type a long text message, email, or article, you can quickly set it back up with less effort! PLEASE NOTE, ULEFONE POWER ARMOR 16S DEVICE NOT INCLUDED 2. [LIGHTWEIGHT] The SlimKeys Bluetooth Keyboard's responsive chiclet-style keys are big enough for the same tactile touch-typing as on a full size keyboard and are thin and light enough to carry anywhere! 3. [BATTERY-SAVING] The Slimkeys Bluetooth Keyboard's on/off switch enables you to conserve battery power by turning off the keyboard when not in use. Its advanced Bluetooth Version 3.0 is also designed to avoid the battery-draining cost of leaving the older bluetooth version on constantly. 4. [BLUETOOTH VERSION 3.0] BLUETOOTH VERSION 3.0 is the latest in Keyboard pairing technology! This means faster pairing and seamless communication between your device and the SlimKeys Bluetooth Keyboard!