Inkbird Wireless Thermometer Humidity and Temperature Monitor, IBS-TH2 Freezer Thermometer Bluetooth Temperature Sensor Smart, with APP for Android and iOS (Temperature and Humidity Sensor)

Sensitive temperature and humidity sensor; Stores max 30000 data points on the device | The temperature sensor ranges from minus 40 to 140 degrees Fahrenheit and the humidity sensor ranges from 0 % RH-99 % RH | Graph, accuracy calibrating, high and low-temperature alarm notification, data export, and setting the sampling interval are supported via the App | Up to 98 feet (without obstacle) remote control via Bluetooth; Compatible with INKBIRD gateway IBS-M1 and IBS-M2 | This thermometer hygrometer is waterproof IPX4, you could put it into a freezer or refrigerator to record the temp data | Built-in magnet, this sensor could be attached to the metal without glue or nails