A smarter way to
use your calculator

All sales are final. Orders will not be canceled or refunded for reasons such as a change of mind or the calculator not arriving in time for an exam. Please order accordingly, as requests for faster shipping will not change the fulfillment timeline. Replacements may be provided at our discretion if a genuine defect is confirmed after review. Replacements are not guaranteed and cannot be requested or demanded.

Orders typically take 3–4 business days to be fulfilled before shipping. During periods of high demand, fulfillment may take up to one week.

Delivery times are estimates and not guaranteed. You can check your delivery estimate during checkout after entering your shipping details.

Once a package is marked delivered by the shipping carrier, the order is considered fulfilled. We are not responsible for packages that are lost, stolen, or misplaced after delivery confirmation by the carrier.

All calculators are used or second hand units. Some may show light cosmetic wear. Occasionally a unit may have a small dead pixel that does not affect functionality. Again, all units are secondhand, so scratches and normal wear are expected.

This is a custom built, experimental electronic device and should not be considered a traditional consumer retail product. Please keep this in mind while purchasing and using the device.

Performance and accuracy are not guaranteed to be 100% and may vary depending on conditions. Proper lighting, positioning, and sometimes multiple attempts may be required for best results.

The device requires a WiFi connection and basic user setup.

Calculators are not shipped with batteries. Buyers must supply their own 1.2V AAA 1100 mAh high capacity NiMH rechargeable batteries. A link to the recommended batteries is provided in the YouTube tutorial video. These batteries are required if you expect the camera calculator to last around 2 hours continuously or the typing calculator to last around 10 hours continuously. Using different 1.2V battery brands may result in different battery life. 1.5V AAA batteries are not advised and should be avoided. Remember to remove one battery when the calculator is not in use to fully shut off power.

Buyers will receive a setup tutorial via a QR code inside the package explaining how to use the calculator. There will also be another video showing how to change the API key and update the WiFi name and password. Please watch the main tutorial very carefully before use.

The buyer is responsible for following the setup tutorial and properly configuring the device, including WiFi connection, API key configuration, and battery installation. Most setup issues occur when the tutorial is not followed carefully.

Support is provided only through email at nohlihelp@gmail.com. You may join discord.gg/nohli to ask questions, but the preferred and professional method of communication is email unless asked otherwise. Since communication through email is important, you must enter your email during checkout.

Buyers are responsible for reviewing the product description, requirements, and compatibility before purchasing.

By completing a purchase, the buyer acknowledges that this device uses experimental technology and agrees that variations in performance, response time, and results may occur.

We are not responsible for misuse of the device or for use in ways that violate school rules, testing policies, or institutional guidelines. Any use during exams or against school or testing rules is the responsibility of the user.

If you are unsure about compatibility or functionality, please contact us before purchasing.