Cheap And Discounts 16 Channel Electromagnetic Relay Module, Low Level Trigger, Bidirectional Terminals, 12V/24V Available Voltage Relay 30V DC/AC22 Wholesale. Buy Directly From Merchant YonChenAi Smart Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.