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Amazon.com: AEDIKO 4pcs HC-06 Bluetooth Module RS232 4 Pin Wireless Serial RF Transceiver Module Bi-Directional Serial Channel Slave Mode Module : Electronics
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Amazon.com: ACEIRMC 4pcs HC-06 RS232 4 Pin Wireless Bluetooth Serial RF Transceiver Module Bi-Directional Serial Channel Slave Mode for Arduino : Electronics
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