Muhao China e-shop Store Results 1 - 2 of 2 Electrical Equipment & Supplies 1 Channel Blue Board Relay Module with Optocoupler Isolation, 1 Piece, Output Low Level Trigger, 5V/12V/24V for Electronic DIY Good Deal US $0.8 Electrical Equipment & Supplies 1-Piece 2-Channel Relay Module with Optocoupler Isolation, 5V/12V/24V, High/Low Level Trigger Output, Ideal for Electronic DIY Projects Good Deal US $1.68