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Rm. 16H, Unit B, Duhui 100 Bldg., Zhonghang Road, Shennan Middle Road, Shenzhen, Guangdong, China (Mainland)
2-channel 2 channel relay module relay expansion board 5V low level triggered 2-way relay module, US $ 0.5 - 0.8 / Piece, Guangdong, China, OriginalBrand, 12V 1 Channel Relay Module.Source from Shenzhen Rainbowsemi Electronics Co., Ltd on Waimaotong.com.