This is temperature sensor for a Hodik weather station. It is compatible with the H2, H3, H7, & H8 models.
Directions:
To connect the sensor with your weather station, press the "channel" button on the back of your weather station screen. If you have one capable of handling multiple sensors, chose channel 1, 2, 3, etc. There will be a radio icon by the number in the section for outdoor temperature monitoring. You can also use the sensors to measure temperature in a server room, indoor room, refrigerator, terrarium, incubator, baby bed, etc.
Requires two AA batteries. Brand new in original packaging.