A new OnePlus tablet has been certified by the FCC with the model number OPD2408. While the certification process unfortunately hasn't revealed any of its specs, it's easy to speculate that this will be a rebranded Oppo Pad 4 Pro, which just launched in China a week ago.
Oppo and OnePlus are sister brands and they do sometimes play the rebranding game, especially when it comes to tablets, so this wouldn't be anything out of the ordinary. Do however note that this is just speculation on our part. Anyway, if it does pan out, then logic dictates this will be called OnePlus Pad 3 Pro and will complement the Pad 3 which was announced in December in the brand's roster.
Oppo Pad 4 Pro
If it is indeed a rebranded Oppo Pad 4 Pro, then expect it to have a 13.2-inch 2400x3392 LCD screen with 144 Hz refresh rate and 900-nit peak brightness, the Snapdragon 8 Elite SoC at the helm, 8/12/16GB of RAM, 256/512GB of UFS 4.0 storage, a 13 MP rear camera, an 8 MP front-facing camera, and a 12,140 mAh battery with support for 67W wired charging.