Calendar should stop and go in a temperature range of 10 ℃ -50 ℃, appear normal. Today twenty-first century, the most representative of timing products is electronic calendar electronic calendar Which affordable, modern world watch industry's third revolution. The first is the balance and balance spring of the invention, the relative stability of the mechanical oscillation frequency source so watch walking mechanical clock or watch the time difference from grade down to the second level, it is representative of the product with a pendulum or balance spring. Second revolution is the application of the quartz oscillator, invented the time to go higher precision quartz electronic watches electronic calendar price, so watch the time difference from month to go down to the second level classification. Keys for time, date, week and temperature adjustment and control alarm and stopwatch functions. Calendar has joined the voice chip, can bring the whole point timekeeping function of temperature and alarms. Can for year, month, day, week, hours, minutes, seconds chronograph electronic calendar Which is good, the time display area are very common. And it has a leap year to make up for the function, the working voltage of 2.5V ~ 5.5V. Three-wire interface with the microcontroller synchronous communication, and using a burst mode transfer clock signal or more bytes of data RAM. Which inexpensive electronic calendar | Hongyuan Electronics (certified) | Jiyuan electronic calendar provided by the Henan Hongyuan Electronic Technology Co., Henan Hongyuan Electronic Technology Co., Ltd. (www.wannianli88.com) is Zhengzhou, craft gift processing leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Hongyuan electronic leadership with the staff warmly welcome all inquiries negotiations to create a better future for the Hongyuan electronics.