you need to attach this to a computer. You can either solder a 6-pin header or individual wires.Unit comes without a connector. Please see related male and female pins below. And now, we provide HC-05/06, HC-05 could be setting to Master or Slave by user. HC-06 just be Master or Slave, that could be customized. This module default is HC-06 with Slave mode.
Be paired must Master devices and Slave devices each other.Master and Master devices, Slave and Slave devices can't paired each other. The HC-06 (just suppy slave mode and more easy) Slave mode could paired with PDA, PC etc.
Bluetooth protocal: Bluetooth Specification v2.0+EDR