This device is a 30 ampere 5 volt range current Hall Sensor module.
Product parameters: 
Working voltage: 5v 
Measuring range: 30A current 
Corresponding analog output: 66mV/A [0 current output is the midpoint voltage of the power supply, isolated type] 
The default delivery is to match the terminal block, but the terminal block is not soldered.
Board size: 35 (mm) x17 (mm) /1.37''x0.66''(approx) (PCB)
 
    
             
 
 
 
 
 
 
  
 