ST-3668 
 ● changes in temperature and humidity level 4 according to weather forecast: sunny, semi-sunny, cloudy, rainy day 
 ● temperature measuring range: 0oC ~ + 60oC, refresh time: 60 seconds. Resolution: 0.1oC. 
 ● humidity measuring range: 20% to 99%, refresh time: 60 seconds. Resolution: 1%. 
 ● dry, comfortable, comfortable humidity level 3 pattern display. 
 ● C / F temperature unit switching function keys. 
 ● 12/24 hour format switch the function keys. 
 ● Time display hour, minute display. 
 ● Seven-Segment week language. 
 ● 99 calendar years (January 1, 2001 ~ Dec. 31, 2099). 
 ● 12-hour temperature change trend curve. 
 ● temperature and humidity maximum and minimum values history. 
 ● alarm alarm. 
 ● 8 分钟 Snooze function. 
 ● Low-voltage detection. 
 ● backlight. 
 ● 3V battery.