iiyama TE7515A-B1AG 75-inch 4K interactive display

Consider it for a classroom, a training room or a meeting room where people write on the board rather than only watch it, and where the display needs to work on its own without a PC. At 75 inches it suits a standard room; measure the furthest reading position against the smallest text you use before deciding between this and the larger TE8615A.

No. iiWare 21E runs on the display's own Android 14 system with a whiteboard, the iiBrowser web browser, a file manager, cloud drive access and iiShare wireless sharing built in. A laptop connects over HDMI, DisplayPort or USB-C when you want to work from your own files, and an Intel OPS 80-pin module can be fitted in the rear slot if you want a full Windows PC behind the screen.

It means the display is licensed to run Google's mobile services, so managed Google accounts, the Google app catalogue and Google sign-in work natively on the panel rather than through a workaround. For a school or an organisation already using Google Workspace, that is what lets the board be enrolled and managed like any other device. Confirm your account policy and licences with your IT team, as those are separate from the hardware.

iiyama lists 40 touch points with 32-point writing on a supported operating system, quoted to +- 1mm accuracy, with palm rejection so a resting hand does not draw. In practice that lets several people work side by side across the width of a 75-inch panel using the supplied pens, a finger or a gloved hand.

It ships with iiWare 21E on Android 14. iiyama has published a later Android update for this series as a future roadmap item rather than a shipped version, so plan around Android 14 and ask us to confirm the build installed on your delivery if a particular app or policy depends on it.

Yes. The USB-C input carries DisplayPort 1.2 alternate mode video at 3840 x 2160, touch data back to the laptop and 100W of power delivery on a single lead. Your laptop and cable both have to support DisplayPort over USB-C, and a machine that draws more than 100W will still want its own charger.

16GB of RAM and 128GB of internal storage, driven by an RK3576 octa-core processor with Mali G52 MC3 graphics, plus a micro SD card slot. The TE8615A in the same family uses the same processor but 8GB of RAM, so the 75-inch model is the better pick if you expect lots of apps open at once.

An ambient light sensor, an NFC reader, a PIR motion sensor and a pen pick-up sensor, alongside built-in WiFi 6 and Bluetooth 5.0 and two gigabit RJ45 ports wired as in and out. The motion and pen sensors are what let the display wake and switch to writing mode without anyone touching a menu.

iiyama lists 216W typical, 0.5W in standby and 0.3W in off mode, on an internal power supply running from 100V to 240V AC. The TE8615A is listed at 300W typical, which is worth factoring in if you are fitting several displays on one circuit.

Choose by viewing distance and the smallest text in your material, not by room capacity alone. Both are 4K UHD at 550 cd/m2 with the same iiWare 21E system, the same speakers and the same 40 touch points, so the larger panel adds size rather than detail. Against that, the TE8615A weighs 68kg to this one's 54.6kg and uses a different mounting pattern, while the 75-inch model carries twice the RAM.