Both the Wi-Fi version and the Wi-Fi + 4G version run the same system and AI features. The differences are in network connectivity, power design, and battery life.

Key differences between the three versions:

Battery life may vary depending on the network mode or the type of batteries used.

For the Wi-Fi version(XTAR 1620mWh AAA Required): battery life varies depending on actual usage.

For the built-in rechargeable battery version:

• Calculator mode (no network): up to 16.5 hours on both versions

• Wi-Fi mode: up to 5 hours of continuous use

• 4G mode: up to 10 hours of continuous use

For full hardware details, please refer to our Tech Specs page.

Yes. 7-Cal includes a 1-year limited hardware warranty. For details, please refer to our Return, Refund & Warranty Policy

For faster support, please join our official Discord community

You can also contact us by email at support@7-cal.com.

The system language of the device is English.

However, the AI responses support the following languages and symbols, which cover most use cases. If the language you need is not listed, please contact us - Languages： Albanian, Arabic, Bengali, Chinese (Simplified, Traditional), Croatian, Cyrillic (Russian, Bulgarian, Serbian, Ukrainian, Belarusian, Macedonian, Mongolian), Czech, Danish, Devanagari (Hindi, Sanskrit, Marathi, Nepali), Dutch, English, Estonian, Finnish, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Latvian, Lithuanian, Maltese, Malayalam, Norwegian, Polish, Portuguese, Romanian, Slovak, Slovene, Spanish, Swedish, Tibetan, Turkish, Ukrainian, Urdu, Vietnamese, Welsh - Symbols： Ancient Scripts, Animals, Emoji, Emoticons, Games and Entertainment, Geometric Shapes, Mathematical Symbols, Weather

- LaTex display support(Beta)

💡Language Setting tips: If you want the AI to reply in only one specific language, you can set this in your Custom Prompt:

'Please reply in .... only.' If you want the AI to display formulas only in LaTeX rather than Unicode, you can set this in your Custom Prompt too. And turn on the Latex Display in the Backend Panel.

Please connect your device to any Wi-Fi network you own, open the admin panel (the backend of your phone or wifi router), and then you can check the MAC address yourself.

No. The Chatroom feature does not support direct communication between two or more calculators.

Chatroom is designed for communication between a 7-Cal calculator and the web Chatroom interface. Users can send text or photos from the calculator to the chatroom, and view or reply through the web interface on a phone, tablet, or computer.