High pressure mini air pump AJK-B3601

Hi, what is the pin out for AJK-B3601? which one is positive and which one is negative? thank you
Usage:Air Pump
Power:Electric
Pressure:High Pressure
Feature:Long Life,High Efficiency,Energy Saving
Function:High Flow Rate Air Pump for Massage Chair
Max Flow Rate:>15.0 l/min
Max. pressure:80kPa
Warranty:1 Year
Product name:12V/24V Small Micro Diaphragm Medical Air Pump
Application:massage quipments, beauty equipments and vacuum package
Application:Family Homes
Power Source:Electric
Structure:Diaphragm Pump
Certification:RoHS
Certification:Reach
Place of Origin:CN;FUJ
Brand Name:AJK
Horsepower:12
Pressure:80kPa
Cable Length:as per required
Outlet Size:7mm
Voltage:6V,/12V/24V
Power:12W