BH-DJ-ZB1~5 Series Residual (Leakage) Current Protective Relay uses a phenolic casing. Can be Din Rail or screw-in mounting style. 
Has 2 trip current settings, which can be switched by changing the jumper connection positions. Break time can be either Instantaneous or Time-delayed. 
Has a Test and a Reset button, as well as a LED tripping alarm indicator.