The Jisulife FA13P Oscillating Extendable Desk Fan - Grey is a powerful and versatile fan that is perfect for use in a variety of settings, including offices, bedrooms, and living rooms. It features a long-life battery that can provide up to 28 hours of use on a single charge, and it can be easily adjusted to the desired height and angle. The fan also has a variety of speed settings, including a sleep mode that is designed to be quiet and non-disruptive.