Modular LED steady/flashing signal tower lightsAdded a separate color filter lens inside the outer lens to help provide a clear signalThe addition of modules and change in color arrangement can be achieved without the use of tools by using the Lock-type structureQTCA type offers a nifty integrated lens and cover for a simple aesthetically pleasing productWhen it is turned off the milky color filter provides comfortable viewing at close proximity for the operatorBuilt-in buzzer available : Volume of Max. 85dB at 1mAvailable in customized 2 sound buzzer type and high volume(100dB) buzzer typeCan be used with NPN open collector transistor driven input, which allows direct connection to a PLCFlashing rate : 60-80 flashes/minAmbient operating temperature : -30°C to +50°CProtection rating : Standard type-IP65, Built-in buzzer type-IP54Pre-wired is standard. Can customize the product with the M12 connector if requested24VDC UL listed model is optionally providedCertificates : CE Compliant, UL ListedCompliant with RoHS directive