Wireless window door contact 75x25x12mm, pure white. The battery-free window door contact FTK supplies itself with a solar cell and stores the energy for the nightly operation. When closing and opening, a signal is sent. The current status is also sent approximately every 20 minutes. Attachment by sticking, also for external mounting. Dimensions of window door contact LxWxH: 75x25x12mm, dimensions of magnet LxWxH: 37x10x6mm. Solar-powered energy storage: For testing and operation, the FTK must first be charged for several hours in daylight or artificial light. After that, the device is ready for teaching according to the operating instructions of the actuator. For this purpose, only the magnet has to be held briefly to the position marked with n after the actuator to be programd has been activated. If window door contacts FTK are taught in in switching actuators FSR14, links of up to 116 FTK are possible. Please observe the operating instructions of the actuator for this purpose. If wi