Oumefar DB9 RS232 Remote Control Relay Module 12V 4Channel UART Serial Port Switch Wireless Remote Control Relay Board for Car Motor

【SIX COMMANDS OPERATE】 :This Remote Control Switch has six commands to operate ,which are "Read" ,"open" ,"close" ,"Self locking",click ,interlock ,which can satisfy most of the industrial control . 【SWITCH STANDBY CURRENT】 :This Remote Control Switch standby current (all relays closed) 18MA ,1 relay open 50MA ,2 relays open 81MA ,3 relays open 110MA ,4 relays open 141MA ,which can be a great helper to you . 【GREAT PERFORMANCE】 :This DB9 RS232 Relay Module is a great DC12V remote control relay switch ,which is normally used for smart home lighting ,fan or motor ,you don’t have to worry about the working performance of this Relay Board . 【HIGH QUALITY MATERIAL】 :This DB9 RS232 Remote Control Relay Module has taken the material of plastic shell and electronic component ,which is brand new and has high quality assurance ,and we hope this Relay Board will meet your basic need . 【AFTER SALE SERVICE】 :We are committed to bringing you a comfortable experience .If you have any questions about this Remote Control Relay Module ,please feel to contact us immediately , and we will serve you wholeheartedly .