4PCS Mini Digital Hygrometer and Thermometer Reptile Thermometer with Extend Probe (Only Temperature) Indoor Temp and Humidity Meter with Magnet

One machine dual-use: Just put the sensor probe on the place you want to measure temperature, please note that the sensor probe is waterproof, it can use as an aquarium thermometer.But the thermometer is non-waterproof. The wired probe was for temperature only, not for humidity.It is also can measure temperature and humidity without using a probe。
MAX & MIN Records: This hygrometer digital thermometer displays high/low temperature and humidity levels to allow you to make proper comparisons using your environmnet’s data.
High Accuracy & Quick Refresh Rate: This inside thermometer features a high accuracy of ±5%RH and ±1.8°F, making it ideal for measuring fluctuating readings like those found in a greenhouse; Data measurements are updated every 10 seconds to give you the latest updates on your environment
12-18 Months Long-life Batteries: Each small temperature and humidity gauge is powered by one long-life CR2032 button cell battery, easy to buy and replace, which is already installed in the thermometer humidity monitor.
Multiple Placement Options: This humidistat has 2 placement options – Tabletop Stand and Magnetic Back place the wall thermometer anywhere you wish such as humidors greenhouse garden gellar closet guitar case.The wired probe was for temperature only, not for humidity.