HC-06 Bluetooth Wireless Module Features:

• HC-06 only supports Slave Mode
• HC-06 Bluetooth wireless module allows your device to both send or receive the TTL data via Bluetooth technology without connecting a serial cable to your computer. Just Power, Ground, RX, TX and you can send data to/from Arduino.
• Works with any USB Bluetooth Adapters
• Default Baud Rate: 9600, 8, 1, n. Default Passcode: 1234
• Built-in Antenna
• Coverage up to 30ft