Printed circuit board (PCB)
The PCB contains various electronic components including integrated circuits (ICs), capacitors, resistors, and connectors.
Key identifiable ICs include an SST 39VF040 70-4C-NHE flash memory chip and an AM98520 chip.
Markings on the board include "E11950", "QC81", "CN-GPRS", and "CR7Y-ET".