Questions about Technoline Ws-9130-It

Hello Pschindler. Yes, the outdoor sensor is included, with 2 small dowels and screws. Instead of drilling, I hammered two small nails into the bracket through the screw holes. The sensor can be removed from the bracket to change the battery, clicked out. As far as I know, you need two different batteries for the transmitter and the sensor (2 x AA + 2 x AAA), not included. Greetings Roger