SE | Integrated electro-hold-open Door Closer, Size range 2-4 and Size Range 3-6 in accordance with EN 1155 | 24v DC +/- 100 mA Power Supply | The Closer is Completely Installed into the Door Leaf and Frame, the Guide Rail is only visible when the Door is Open | Adjustable Backcheck | Adjustable Variable Closing speed | Adjustable Closing Speed | Adjustable Hydraulic latching action | Includes intumescent pack