This is a soil moisture sensor that sends moisture data to a receiver (screen).Wireless transmission: 433MhzRemarks: The maximum distance of wireless transmission is 100 meters (measured in the open, no block and no interference. If there is block and interference, the signal will become weaker and the distance will be shortened. Even the signal will be lost.)Remarks: In winter, the outdoor climate is cold and the temperature is low, the battery may not work. Therefore, when the temperature is low, it is recommended to use lithium batteries, which may have better results.NOTE: This is a spare part (wireless soil moisture sensor), it is suitable for some products of for misol.Specifications1) Moisture Range:0~100%; Resolution: 1%2) Frequency: 433 MHz3) Update Rate: 70 seconds4) Requirements:1x AA 15V AA battery (not included in the package)Material:plasticcolour:GreenPackage Contents:1 x soil moisture sensorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.