• How does it work?

  • There is the Hub, AKA Router or Bridge, it manages the displays within a certain range. The Hub connects to the Internet with WIFI/Ethernet.

  • The display connects to Hub via Wireless Mesh Network (ZigBee), which is more private and consumes much less power.

  • When information updates, the Hub will send a notification to display and refresh the screen.

  • Our devices are available under the most network environments globally.

  • What kind of integration details can you provide?

  • Regarding the integration, SyncSign has integrated with Google Calendar, G Suite, Office 365, Exchange. Also, we will provide SDK or API, so your tech developer can write a “bridge software” to connect your existing meeting room booking system to SyncSign system.

  • What are the distances of the communication?

  • The distance between Hub and 7.5-inch Display:

    • For the indoor line-of-sight distance, it’s about 100m (328ft).

    • In outdoor free space, it’s about 150m (492ft).

  • The distance between Hub and 2.9/4.2-inch Display:

    • For the indoor line-of-sight distance, it’s about 30m (100ft).

    • In outdoor free space, it’s about 50m / 160ft.

  • What is the maximum number of displays each Hub could support?

  • One Hub can support 16 devices, due to the memory constraints. The less, the more stable. If there’s Zigbee router in between, that would be more stable.

  • Can the screen show other information?

  • SyncSign integrates with Google Calendar, G Suite, Office 365.

  • It’s possible to customize the contents of the screen via web management portal.

  • We also provide the open SDK/API so that developers can integrate it with your Content Management System (CMS).

  • What’s the main difference between these 3 sizes display?




E-paper & Non-touch screen

Color Built-in





2 x CR2032 Replaceable

2 x CR3032 Replaceable

built-in rechargeable polymer (4 hours fully charged)

Refresh Times

5000 =10 times/day last for 1 year

8000 =20 times/day last for 1 year

8000 =20 times/day last for 1 year


ZigBee Only

ZigBee Only

Wi-Fi + ZigBee (Dual mode)

  • Does the Display charge or replace the battery?

  • 2.9/4.2-inch Display: Battery Replacing Type. 1 Year Standby.

  • 7.5-inch Display: Rechargeable Polymer Battery. It only takes 4 hours to be fully charged, and last for about 1 year.

  • How do I know if the battery is used up?

  • You will find the battery level of each display in the web management portal.

  • Is there a backlight on the screen? What if it’s in the dark?

  • To save energy, there is no backlight on the display.

  • You can install a battery powered LED light on the top, it’s triggered by human movement.

  • Can the battery life extend to be 5 years?

  • Right now, we can only try to do 3 years utmost.

  • The battery life depends on:

  • How many times to refresh the screen every day;

  • How fast you’d like to synchronize with data sources;

  • The distance between display & hub;

  • The quality of the battery itself.

  • Our general spec of battery life is 1 year, it’s based on:

  • Refresh 10 times per day;

  • Sync every 10 seconds;

  • The distance of display & hub < 30ft;

  • The battery provided by us.

  • If you want longer battery life, we can adjust the above parameters and use a better battery to achieve this goal.

  • What is the method to store data? Is it sending data through your server in China?

  • The web service is hosted on AWS (US).

  • The real calendars/events data are kept in Google Calendar / Microsoft Office 365 server.

  • Our web service only does one job: whenever an event changed, it receives notification from Google/Microsoft, then forwards this update to the Hub in your office. It doesn’t know the event itself, thus only a last-modified timestamp is stored temporarily.

  • When notification received, the Hub in the office will read/write the events directly.

  • Is this an 802.11 device or an 802.15.4 device, or both? If it’s 802.15.4, which protocol are you using?

  • The Hub is using both 802.11(WIFI) and 802.15.4(ZigBee), while those Displays is using 802.15.4(ZigBee) only.

  • To adapt to market requirement, 7.5-inch will come out of the 802.11(WIFI) version at the next stage (without using the Hub). These two modes are free to switch, just need the software upgrade installation.

  • How many colors can be displayed on the screen?

  • For 2.9/7.5-inch, it has black & white & red color built-in.

  • For 4.2-inch, only black & white.

  • Because more built-in color, the screen needs more time to respond and consumes more energy. 4.2-inch has 4 buttons as user input, it needs a faster refresh rate to change the screen content.

  • Why only 4.2” display has buttons and not others?

  • Because the refresh rate is closely related to built-in color. More built-in color, the screen needs more time to respond. It’s not possible to use button to immediate respond.

  • 4.2” display has 4 buttons for interactive function, so it needs a faster refresh rate to change the screen content. So it doesn’t have any color built-in, only black & white.

  • For 2.9/7.5”, they have red/yellow color built-in.

  • How is SyncSign attached to the door or wall?

  • Because the device has no cables whatsoever, installation is a simple matter of peeling the white sticker off and attaching SyncSign to the wall or door. SyncSign can be attached to any surface without drilling or the need for a heavy, costly installation. Attach SyncSign to the door or wall and easily detach it at any time to charge.

  • (You can fix SyncSign on any firm surface you want; glass, wood or brick, it will stick. As long as your chosen spot is clean, isn’t uneven or bumpy and your plaster isn’t peeling or flaking off due to a number of repaints, you’re good to go.)

  • What kind of API is it?

  • Why a Global Admin is needed for the O365 app method set up?

  • How to update the time zone for your G Suite resources?

  • What’s the MAC address of my IoT Hub?

  • You may find out on your router’s device information page.

  • Or, please find the S/N on the bottom of the device,

  • The MAC address for WiFi is the same as the SN, the MAC address for Ethernet is the SN + 3

  • for example, If the SN is MCE44F33383271 or E44F33383271, then, the MAC Address for WiFi is: E4:4F:33:38:32:71; The MAC Address for Ethernet: E4:4F:33:38:32:74