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The manufacturer supplies a new 1-way relay module 5V/12V low-level trigger relay expansion board

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1 Channel Relay 5V Low Level Trigger Relay Module MCU Expansion Board Household Appliance Control for Arduino DIY

1/2/4/8-way 5V12V24V relay module with optocoupler isolation supports high-level trigger expansion board

1/2/4/8CH 5V12V24V Relay Module with Optocoupler Isolation Supports High and Low Level Trigger Expansion Board

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