The device's design looks like a combination of the current gen phones, the OnePlus 8 Pro and OnePlus 8T.
The OnePlus 9 Pro sports a curved display with a punch-hole in the top left corner for the lone selfie camera. Onleaks says that the screen is 6.7-inches in size. The volume rocker keys are on the left edge of the phone's frame, while the Alert slider and power button are on the right. The handset has a single speaker grille, and a USB Type-C port for audio, data transfers and charging.
The OnePlus 9 Pro leaked render confirms that the phone has quad cameras. The lenses are housed in a vertical array in a large bump in the top left corner of the rear panel. Two of the cameras have very large lenses and are surrounded by a metal ring, the other 2 are smaller lenses. The camera bump also contains an LED Flash and a microphone along with some other sensors.
Rumours suggest that the device will be powered by a Qualcomm Snapdragon 875 processor. We can also expect the OnePlus 9 Pro to support 65W Warp Charge.