100% brand new and high qualityFeatures:Use for detecting whether 220V alternating current exits,for electrician,output TTL level can be used for singlechip detection.Power supply is 3 to 5V,and can be connected with PLC24V as well,while connects with PLC input end,COM end of PLC's power should be 24V,and input end connects this module's output signal and Optical coupling plate connects power negative pole.Blue 2P 5.0 end requires to connect 220V voltage,and 3P end connects input of SCM.module only,other accessories demo in the picture are not includedSecurity Warning:After powering on this module,DO NOT touch any components of this module in white frame,due to high voltage,please pay attention to electric security.Specification:Type: 1 Bit Optocoupler IsolationVoltage: 220VSize: One Size1.5x7.2cm(0.59x2.83in)Quantity: 1 PcNote:1.No retail package.2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youPackage includes:1 x Module