Using a 000-size Philips head screwdriver, you can remove the 4 underside screws. Then, unclip the tab at each rotor tip and the two halves of the PCB can easily be separated.

Four quadrant views of the quadrotor, showing the power switch and charging port, camera, etc. (but no microSD slot)

The underside part of the quadcopter, as usual with Cheerson drones, it's not built to land on water. But unlike the CX-10 or CX-10C, the CX-10W has an external antenna, which I think is for 2.4GHz Wi-Fi.

Once, the insulating plastic tape, which distorts the package markings in one side of the bottom-half PCB, is removed, you can see the exact three foundation ICs, also found in CX-10 and CX-10C. These are Panchip Microelectronics' XN297 2.4GHz transceiver (bottom) for wireless mice and other applications; InvenSense MPU-6050 MEMS IC (above and right of the XN297) that combines 3-axis gyro and 3-axis accelerometer functions along with integrating a motion processor; and STMicroelectronics' STM32F031K MCU (left of the MPU-6050 as well as above and left of the XN297), based on an ARM Cortex-M0 processor.

Here's the top-half PCB. Based on the markings on the other PCB, one of this PCB's functions involves Wi-Fi (the other two wires handle power and ground). And in fact, the IC at the center is a Marvell 88W-class 802.11 transceiver. With the same plastic tape distortions like in the other side, the model number is barely readable. Regardless of its exact identity, you can also discern the solder connection for the Wi-Fi antenna (left of the Marvell transceiver IC).

Here's the other side of the PCB. When you move the lithium-ion polymer battery away this is what it looks like. You'll also find another antenna. Considering what's on the other side of this same PCB, this antenna likely handles Panchip's proprietary 2.4GHz protocol.

Flipping the PCB, you can see the Wi-Fi antenna into clearer view. You can also now see the SoC for the still/video camera, as well as the camera itself. Both seem to be identical to those found in the CX-10C, but unfortunately the SoC's identity is once again obscured by missing package markings.