This 6-pin HC-05 Bluetooth RF transceiver module can be set as a transmitter or receiver. It can easily transfer data wirelessly, without complex PCB layout or deep knowledge in the Bluetooth software stack.
You can combine this Bluetooth module with your MCU, ARM or DSP systems, SOC systems, Personal Digital Assistants (PDAs), Computer Accessories or other systems your want to use under Bluetooth functions.
The HC-05 Bluetooth module can connect to other modules in two ways: As a master, or as a slave. For example, a robot can be designed to be a master connected to a slave Bluetooth module or as a slave board to make a wireless connection with a PC.
Specifications:
Integrated Bluetooth Serial Pass-through Module Master-Slave 6 Pin JY-MCU anti-reverse
High frequency: 2.4GHz
With VCC, GND, TXD, RXD, EN, STATE foot for the Bluetooth
Master and slave, two modes in one module
Uses the CSR mainstream bluetooth chip
Bluetooth V2.0 protocol standards
Input voltage: 3.6V to 6V, on-board chip regualtes working voltage to 3.3V
Fully compatible with Arduino
High speed: Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps
TTL data transparent
Transfer between a host Bluetooth device
Works for Bluetooth TTL transceiver module which allows your target device to both send or receive the TTL data.
Coverage up to 10 meters (30 feet) with built-in antenna.
Working current: When unpaired, current of about 30mA; when pairing is successful, current reduces to about 10mA
PCB Dimensions: 37mm x 15.5mm

Package includes:
2x (2 pieces) HC-05 6-Pin Bluetooth module with backboard
Printed installation and operation instructions