WHEN Clock Information

With network: Error is less than 1 second after successful time synchronization

Without network: The clock uses the RX8010SJ RTC model from Epson, with a built-in crystal oscillator. It’s factory-calibrated, and according to the datasheet, the frequency stability is ±1 minute deviation per month @25℃.

Note: The above accuracy data comes from our company’s tests and the chip manufacturer’s datasheet. Due to different testing conditions, there may be variations. This clock is not a precision instrument; the above data is for user reference only and does not guarantee accuracy. Below are test videos regarding accuracy.

Additionally: Some users compare the clock with their phone or computer time, but most devices are not very accurate. For comparison, please use web-based time,

Recommended time websites: https://time.org.cn https://time.is

The following conditions indicate that the network has been successfully configured:
①The blue LED on the lower right front is off.
②Enter configuration mode, [Network Settings]- [Status] section shows ‘Normal’.

It depends on the power bank. Since the clock has low power consumption, most power banks will automatically shut off. The power bank needs to support low-current output.

Enter configuration mode, Check [Clock Settings] – [About & Upgrade] – [Device & Upgrade] section.

Under normal conditions, it usually takes 6-8 seconds to connect to the router and obtain the time. If synchronization fails, it will take longer, and the process will retry 6 times.

The synchronization interval can be set, and there is no fixed synchronization timing;
The synchronization interval is always calculated from power-on. The interval can be set to 1 minute, 5 minutes, 1 hour, or 1 day.

Note: If milliseconds are displayed, the synchronization interval will automatically change to 1 minute.

The clock board has its own RTC circuit, allowing it to keep time even without a network. When the power is off, the RTC is powered by a button battery to prevent time loss.
Button battery model: CR1220.

Displaying ‘Err1’ indicates that the RTC chip has reset and the time is lost, possibly because the battery was removed or is dead.

Note: If ‘Err1’ is displayed, the clock will automatically switch to normal display mode once it successfully connects to the network and synchronizes. 。

If the battery is dead, the clock will lose time when powered off. In a networked environment, it will retrieve the time upon powering on, so the impact is minimal with a good network connection. The button battery usually lasts over a year and usually doesn’t need replacement.。

①In most cases, the issue is with the password. Please ensure the Wi-Fi name and

password are correct.

②The clock only supports 2.4G and cannot connect to the 5G band.

③If it’s a mixed network (2.4G and 5G with the same name), try separating them or

enabling a guest network to see if it connects properly.

④Check if the router has enabled settings like a whitelist to prevent unauthorized

access.

⑤Ensure the IP acquisition method matches the router’s settings; usually, DHCP is used.

⑥Some company networks require MAC address authentication. The clock’s MAC address can be modified—consult your company’s IT department for details.

⑦Incompatible with certain routers. Currently, compatibility issues have only been found with TP-Link’s WDR5620 series routers. Version 1.7.x has improved compatibility and resolved the issues with WDR5620 series routers. Please upgrade to version 1.7.x or later and enable the Strong Connection Mode (found in [System] – [Router Conn.] –[Persistent Connection Mode]).

⑧The router’s password authentication mode should be set to WPA/WPA2, as the clock currently does not support WPA3.

⑨If the router specifies a channel, please set the channel to automatic.

The clock display uses a scanning method, so it may appear to flicker under a camera, but it is not noticeable to the human eye and won’t affect usage. If you need clock for filming, choose other clocks with static display mode.

The clock’s built-in temperature measurement uses a digital sensor with an accuracy of ±0.5℃. However, the LED display generates heat during operation, which can vary with room temperature, display brightness, and content. These factors can cause the clock’s temperature reading to be higher than the actual ambient temperature.

To minimize this heat effect, the clock is added a compensation mode in the software to adjust the displayed temperature. However, due to varying environmental conditions, the software compensation may not fully adapt to all situations.

To ensure more accurate temperature readings, it is recommended to set the display brightness to a lower level (levels 1-8). Within this range, the temperature readings are typically closer to the actual temperature. If the brightness is set higher (levels 9-11), the increased heat from the LEDs may cause greater discrepancies in the readings.