Radio push-button tracker with battery (life span 5-8 years). 55 x 44 mm, 15 mm high. Weight only 20 grams. Smart Home Sensor. The wireless pushbutton tracker FTTB has a blue pushbutton with which the normal pushbutton telegram is sent. After opening the housing (reach into the joint and pull it apart), a slide switch in the position Tr the tracker can be switched on. The sensor then sends a presence telegram every 60 seconds. An internal 3V battery CR2032 provides power for several years. https://elecena.pl/product/19543762/30100018-pushbutton-tracker-enocean 2021-09-29 https://elecena.pl/product/19543762/30100018-pushbutton-tracker-enocean 2023-03-20 https://elecena.pl/product/19543762/30100018-pushbutton-tracker-enocean 2023-07-28 https://elecena.pl/product/19543762/30100018-pushbutton-tracker-enocean 2024-01-22