1. Time Source Synchronization

(1) BeiDou / GPS Satellites

• Receives BeiDou and GPS satellite signals to obtain standard time

• More than 50 BeiDou and GPS satellites in total, providing wide coverage

• Only a few minutes of signal reception per day are required for time synchronization

• Suitable for outdoor environments, mountainous areas, remote regions, maritime use, and islands

(2) CDMA Network Time Synchronization

• Receives signals from China Telecom CDMA base stations to obtain standard time

• Time synchronization is available anywhere China Telecom “Tianyi” mobile phones can receive a signal

• China Telecom currently operates hundreds of thousands of base stations with excellent coverage

• Suitable for cities, towns, densely populated areas, as well as indoor and underground locations

(3) Network Time Synchronization

• Obtains standard time by accessing Internet or LAN time servers

• Automatically sends a request to the server after each power-up

• Direct Ethernet connection to a LAN router

2. Automatic Time Calibration

• Automatically eliminates accumulated clock drift by receiving satellite signals, with no manual adjustment required

3. Other Features

(1) Automatic conversion between Gregorian calendar and lunar calendar, with automatic leap year and month-length adjustment; displays hours, minutes, and seconds

(2) Built-in Lithium Battery

• Keeps the internal clock running for up to 5 years during power outages

(3) High Timekeeping Accuracy

• Even without receiving satellite signals, accumulated error is less than 3 seconds per month (0 °C ~ 25 °C)

(4) Temperature Measurement and Display

• Temperature display range: −9 °C to 50 °C

(5) Reliability and Stability

• Equipped with an EMI power filter; unaffected by power supply fluctuations