12) Air pressure measurement range: 800～1100 hPa, error range: ±2hPa, and
the supported unit systems are: hPa / mb / inHg / mmHg;
13) The data trend of indoor and outdoor temperature/humidity/air pressure;
14) Maximum and minimum temperature and humidity recording function;
15) Dew point temperature;
16) Frost alarm function;
17) Temperature alarm function;
18) Heat index;
19) Indoor comfort graded expressions;
20) The PT20C signal receiver can connect up to 3 signal sensors at the same
time, and display the data of each sensor on the receiver screen in a carousel
mode;
21) Low battery alarm;
22) LCD backlight;
23) Power supply: The receiver needs 3 batteries with a specification of "AAA (LR
03)" or a power input with a specification of "DC 5V"; the wireless sensor only
needs 2 batteries with a specification of "AAA (LR 03)".
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