All connection are installed by European styles terminals Wide voltages ranges: 8-36V.4 digits LED tube which can display mains, voltages, frequency Totally 3 relays output, maximums current is 5A(250VAC).1 group programmable switches input Parameters can be set by front face buttons.Standard water-proof rubber, the protections can reach at IP54 Simulated mains function, crank conditions can be chosen