DollaTek
05 Wireless Bluetooth Transceiver Modul Slave and Master RS232 with 6 set cable for Arduino

$8
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Product Details

Bluetooth module Master and slave Two in one module Use the CSR mainstream bluetooth chip, bluetooth V2.0 protocol standards Module working voltage 3.3 V Coupled Mode: Two modules will establish communication automatically when powered. PC hosted mode: Pair the module with bluetooth dongle directly as virtual serial. Note: This is not original Arduino product. it only a substitute accessories from DollaTek

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