Inkbird Smart Thermometer, IBS-TH2 Freezer Wireless Thermometer

Built-in temperature sensor only, stores max 30,000 points of data on the device. Measure temperature -40F~140F.Powered by 2 AAA batteries(NOT included) Graph, accuracy calibrating, high/low-temperature alarm notification, data export, and the sampling interval set are supported via app Maximum range of 98ft(without obstacle) via Bluetooth connection.Please note that IBS-TH2 is not compatible with the gateway (IBS-M1) Waterproof IPX4 makes this thermometer ideal for a freezer or refrigerator. Built-in magnet, this sensor could be attached to the metal without glue or nails. Smart thermometer supports connected to multiple phones and reading multiple sensors with one cellphone Brand new, still in sealed box.