Eltako Wireless window/door contact with solar cell and battery (lifetime 8 years) FTKB-

75 x 25 x 12 mm. Adhesive foil mounting. Wireless window/door contact with solar cell and battery 75 x 25 x 12 mm. Starting at 100 Lux daylight the window/door contact FTKB powers itself from a solar cell, otherwise several years with a button cell. On opening and closing, the related tele­gram is send twice in short succession. The current status telegram is sent cyclically every approx. 8 minutes. Adhesive foil mounting.