Bluetooth is a wireless communication protocol used to communicate over short distances. It is used for low power, low cost wireless data transmission applications over 2.4 – 2.485 GHz (unlicensed) frequency band.
HC-05 Bluetooth Module - Electra
HC-05 Serial Bluetooth Module, 10100272
How to Pair HC-05 Bluetooth Modules
Connecting HC-05 Bluetooth Module to Arduino : 8 Steps - Instructables
HC-05 Bluetooth Transceiver Module - Einstronic Enterprise
Bluetooth HC05 Module at Rs 225/piece, Bluetooth Wireless Module in Guwahati
Using the HC-06 Bluetooth Module
HC-05 Bluetooth Module Fig.2 Encoder for measuring angular rotation
The factory setting is slave mode, but you can set this module to master mode so that you might be able to connect to other Bluetooth 2.0
HC-05 Wireless Bluetooth RF Transceiver Module