1/2/4/8 way 3.3/5/12/24V relay module opto-coupler isolated one, four or eight way high and low level trigger

1/2/4/8 way 3.3/5/12/24V relay module opto-coupler isolated one, four or eight way high and low level trigger
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sku: 1005007315323885
$1.91
Shipping from: China
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