* barometer
* time display
* dual alarms
* indoor tempperature, range: -9.9℃- 50℃ (℃/℉ )
* outdoor temperature, range: -50℃ - 70℃(℃/℉ )
* in/out humidity range: 20% - 95%
* RF outdoor temppearture/humidity up to 3 outdoor transmitters' receivable
* 5 levels' simulant weather forecast function
* history records of MAX/MIN in/out temperature/humidity
* freezing point function
* powered by: Host:  AAA * 3 (excl.) +  adaptor (for option, excl.) Sensor: AAA x 2 (excl.)