1.M8 aviation plug connectors are used to connect electronic devices and sensors. They are widely used in computers, instrumentation and industrial cameras, signal electronic connectors, and can be easily connected to proximity switches, photoelectric barriers, flow monitoring devices, sensor devices and actuator devices. 2.M12 Male Female Connector Specifications: M12 connector ; Number of pins: 4P ; grade: IP67 ; Connection method: thread locking ; Contact Material:Phosphorus copper with gold plated ; Insulator material: PA66 flame retardant reinforced ; Operating temperature: -25°C ~ +85°C ; Rated voltage: 250V ; Rated current: 4A ; Package contains: 5Pcs Male M12 Aviation Sensor Connector 3.PA66 flame retardant shell, flame retardant insulation, thickened nylon, pressure and corrosion resistance. Phosphor copper gold-plated pins, thickened treatment, excellent conductivity, and ultra-long life. The waterproof sensor adopts a thread locking mechanism for anti-vibration locking. 4.The M12 circular connector is a linear connection method for cables, screw connections, and IP67 waterproof.