KNACRO Two-way solenoid valve pump control switch module Dual mos tube module Cycle delay timer Universal 12V/24V Frequent high-frequency circuit to achieve fast off. Off process does not produce noise. No spark, no electromagnetic interference.Longer life than conventional electromagnetic relay life. After the set parameters of power and can never remember, input and output optocoupler isolation, enhanced anti-jamming capability power. Often used to control motors, light bulbs, LED lights, DC motors, micro-pumps, solenoid valve.