The 12 v relay module 1 road with optical coupling isolation low level trigger the expansion board development board
![The 12 v relay module 1 road with optical coupling isolation low level trigger the expansion board development board](http://ae04.alicdn.com/kf/S0f9658f2472e4a1d9880081bc480c784y.jpg)
sku: 1005004815520658
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$2.24
Shipping from: China
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