weather station

Functions:

* barometer display
* time (12/24hr) and calendar display
* radio controlled for option (excl.)
* week day display in 7 optional languages
* indoor temperature (range: 0℃ ~ +50℃, tolerance +/-1℃) and humidity (range: 25% ~ 95%, tolerance +/-5%) display
* RF 433MHz outdoor temperature (range: -35℃ ~ +60℃, tolerance +/-1℃) and humidity (range: 25% ~ 95%, tolerance +/-5%) display, up to 3 outdoor transmitters' receivable
* battery low indicator for outdoor transmitter
* 5 levels of weather forecast
* sound controlled function for indoor unit display, the backlight will be off in 8 seconds
* 3-level display brightness (high-medium-off)