Wireless Window-Door Contact 75x25x12mm, pure white. The battery-free window-door contact FTK is self-sufficient with a solar cell and stores energy for nighttime operation. A signal is sent upon closing and opening. Additionally, the current status is sent approximately every 20 minutes. Installation is done by gluing, suitable for outdoor mounting as well. Dimensions of the window-door contact LxWxH: 75x25x12mm, dimensions of the magnet LxWxH: 37x10x6mm. Solar-powered energy storage: To test and operate, the FTK must first be charged for several hours in daylight or artificial light. After that, the device is ready for programming according to the actuator's manual. To do this, the magnet only needs to be briefly held at the marked spot labeled with 'n' after the actuator to be programmed has been activated. When window-door contacts FTK are programmed into switching actuators FSR14, connections of up to 116 FTK are possible. Please refer to the actuator's manual for this. When window-door contacts FTK are programmed into switching actuators FSB14, FSB61NP, or FSB71, a lockout protection is established when the door is open, which blocks a central off command. Please refer to the actuator's manual for this. When window-door contacts FTK are programmed into switching actuators FHK14, FHK61, FZK14, or FZK61, heating and air conditioning units are turned off when the window is open. Both the window-door contact and the magnet have a marking notch approximately 10mm long at the point where they must lie side by side when the window is closed. Their distance must not exceed 5mm. The wireless sensor can be programmed into the following actuators and into the building wireless visualization and control software: F2L14, F4HK14, FGM, FHK14, FHK61, FMZ14, FMZ61, FSB14, FSB61, FSB71, FSG14, FSR14, FSR61, FSR71, FTN14, FTN61, FUD14, FUD71, FUTH65D, FZK14, FZK61.