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1pcs Hc06 Hc-06 Wireless Serial 4 Pin Bluetooth Rf Transceiver Module Rs232 Ttl For Arduino Bluetooth Module - Replacement Parts - AliExpress
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Amazon.com: HiLetgo HC-06 RS232 4 Pin Wireless Bluetooth Serial RF Transceiver Module Bi-Directional Serial Channel Slave Mode for Arduino : Electronics
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Amazon.com: 5PCS HC-06 RS232 Wireless Bluetooth Serial Port 4 Pin RF Transceiver Board Module Bi-Directional Serial Support Slave and Master Mode : Electronics
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