![Amazon.com: HiLetgo HC-06 RS232 4 Pin Wireless Bluetooth Serial RF Transceiver Module Bi-Directional Serial Channel Slave Mode for Arduino : Electronics Amazon.com: HiLetgo HC-06 RS232 4 Pin Wireless Bluetooth Serial RF Transceiver Module Bi-Directional Serial Channel Slave Mode for Arduino : Electronics](https://m.media-amazon.com/images/I/61US5GN8mUL.jpg)
Amazon.com: HiLetgo HC-06 RS232 4 Pin Wireless Bluetooth Serial RF Transceiver Module Bi-Directional Serial Channel Slave Mode for Arduino : Electronics
![Amazon.com: HiLetgo HC-06 RS232 4 Pin Wireless Bluetooth Serial RF Transceiver Module Bi-Directional Serial Channel Slave Mode for Arduino : Electronics Amazon.com: HiLetgo HC-06 RS232 4 Pin Wireless Bluetooth Serial RF Transceiver Module Bi-Directional Serial Channel Slave Mode for Arduino : Electronics](https://m.media-amazon.com/images/I/617tBvMQxEL._AC_UF894,1000_QL80_.jpg)
Amazon.com: HiLetgo HC-06 RS232 4 Pin Wireless Bluetooth Serial RF Transceiver Module Bi-Directional Serial Channel Slave Mode for Arduino : Electronics
![Amazon.com: DSD TECH HC-06 Wireless Bluetooth Serial Transceiver Support Module Slave and Master Mode for Arduino + 4PIN Dupont Cable : Electronics Amazon.com: DSD TECH HC-06 Wireless Bluetooth Serial Transceiver Support Module Slave and Master Mode for Arduino + 4PIN Dupont Cable : Electronics](https://m.media-amazon.com/images/I/61eujV9wePL.jpg)