UNI-T UT333BT Bluetooth Mini LCD Digital Air Temperature Humidity Meter Thermometer Hygrometer Gauge Tester UT333 Upgrade UT333BT is light weight and ergonomically desiged with user friendly interface. It adopts high-precision temperature humidity sensing module technology to sample, process data and display results on LCD. Bluetooth function is added for data transfer and analysis on mobile App, iENV, which can be downloaded from Google Play or Apple Store. Main Features 1. Temperature measurement range: -10~60℃/14~140℉ 2. Humidity measurement range: 0~100%RH 3. Low battery indication 4. Auto power off