4X Hw-521 Digital Delay 1 Way Relay Trigger Cycle Timer Delay Circuit Board Timing Control Module 4711037238163

4X Hw-521 Digital Delay 1 Way Relay Trigger Cycle Timer Delay Circuit Board Timing Control Module 4711037238163

Wide voltage power supply (6 ~ 30V) supports micro-USB 5.0V power supply, easy to use; The interface is clear and simple, powerful, easy to...

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