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HC 08 4pin Bluetooth Module without Button 3DBI GSM GPRS 3G PCB Antenna with IPEX Connector How does the green LED How does the green LED indicator work without affecting the switch's power capacity This open design holder accommodates six AA batteries in a back to back configuration perfect for space constrained embedded applications and hobbyists use this module to add Bluetooth connectivity to microcontroller based projects without requiring complex wireless protocols
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