Electronic Spices HC-05 Wireless Bluetooth Transceiver RF Main Module Serial For Arduino Electronic Components Electronic Hobby Kit

The HC-05 is a very cool module which can add two-way (full-duplex) wireless functionality to your projects. You can use this module to communicate between two microcontrollers like Arduino or communicate with any device with Bluetooth functionality like a Phone or Laptop. There are many android applications that are already available which makes this process a lot easier.