Check Manual here https://www.dropbox.com/s/5ldgs4ixz47uv7i/20181224030053FCHUB-12SManual.pdf?dl=0

PDB
Input voltage range: 8~60V (3~12S LiPo)
4x70A cont, 4x110A burst
4x ESC power /signal/ telemetry pads
Current Senor: 440A,  3.3V ADC,  Scale 75
2x LED indicators for 5V, 12V
FFC connection
Compatible with MATEKSYS FC F405-STD, F722-STD
VTX: Video Transmitter signal
T5 & R5: TX5 and RX5 of F405-STD/F722-STD
BEC 5V output (5V pad)
Voltage: 5.0 +/- 0.1VDC
Continuous current 5 Amps,  Max.6A
Short-circuit tolerant (2 seconds)
Overcurrent protection & self-recovery
BEC 12V output (12V pad)
Voltage: 12.0 +/- 0.2VDC (Input voltage >=12V)
Continuous current 4 Amps,  Max.5A
Input voltage<12V,  Output voltage = Input voltage
Probably there is audible sound in the BEC12V inductor when Input voltage<12V
Short-circuit tolerant (2 seconds)
Overcurrent protection & self-recovery
Switchable 12V output (SW12V pad)
12V ON/OFF can be switched via PINIO
can be use for powering VTX,LED etc.
BEC 3.3V output
Linear Regulator
Continuous current: 500mA
Physical
Mounting: 30.5 x 30.5mm, Φ3mm
Dimensions: 55 x 50 x 6 mm
Weight: 21g