4pcs 2 in 1 RS485 RS232(TTL) Modbus AT Command NPN PNP IO Switch Module for Relay door lock dc motor

4pcs 2 in 1 RS485 RS232(TTL) Modbus AT Command NPN PNP IO Switch Module for Relay door lock dc motor
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sku: 33023702637
$17.09
Shipping from: China
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