Catalog > Internet of Things (IOT) Related Products > More Platforms BC-04K Bluetooth Breakout R2 BC-04K / Bluetooth / R2 Breakout BC-04K Bluetooth Breakout R2 Part No: ACM BC04 BLUETOOTH ADAPTER BOARD Call for Price (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview It is the bottom board of BC04-BK, support most common type bluetooth core board: BC04-B, EC04-B, do not fully support HC05/HC06. Features Maxium input voltage 7V, LDO XC6206Output pins: Key, TXD, RXD, 3V3, 5-7V, GND.Key is designed for BC04 to clear the pairing status, can connect to a push key.R2 version add software and hardware master/slave mode select, default is software on. To use hardware select, need cut off connection on software ON with middle pin first.Note:You can just solder the pins which you need, the rest can be left.Each purchase is for one piece of the breakout board.