ST804 Temperature & Humidity  Detector Features： â—†Built in 868/923MHz Transceiver module with excellent operation range up to 250M â—†Measurement & trigger setting ranges: -20.0℃～50.0℃ (-4.0℉～122.0 ℉) â—†Max. & Min. Ranger Hold â—†LCD  panel with backlight display â—†Table or Wall mount use â—†3 x 1.5V AA type battery operation â—†Battery Lift time Up to 3 Year â—†Built in Beep Tone â—†0°C freeze indication â—†Compatible with range of Everspring U-Net Command Wireless Device â—†Able to learn ID code up to 12 devices
Specification：
Frequency	868/923MHz
Max Learn Device	12
Operation Range	Up to 250M
Operation Environment	-20℃ ~50℃, 90% RH Max.
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