KST-SL01 and KST-SL02 electric actuators were developed based on the structure of sliding windows. The mechanism was connecting the window sash and window frame by special brackets. The electric window openers will push/ pull the window sash stably by the spindle inside the instrument. Electric window openers are usually installed either on the high windows in residential houses or a series of windows in large buildings. Therefore, there are two models for opening sliding windows electrically. KST-SL01 sliding window opener is built-in RF controlling panels, which is for controlling windows separately. KST-SL02 sliding window opener is for connecting numbers of products and controlling by a central controller.