5PCS HC-05 Wireless Bluetooth Receiver RF Serial Transceiver Module Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module

HC-05 Bluetooth Module is an easy to use Bluetooth SPP (Serial Port Protocol) module designed for transparent wireless serial connection setup. Master and Slave 2-IN-1 HC-05 Module; Working Voltage 3.6V to 6V;
Default baud rate: 9600
Button: Press the button; the module enter the AT mode. AT commands are executed only in AT mode. HC-05 is able to operate in both master and slave mode. Its communication is via serial communication which makes an easy way to interface with controller or PC. It's ideal replacement to your wired serial connection.
HC-05 Wireless BT Module: with this HC 05 Bluetooth module You can quickly add the Bluetooth feature to your motherboard project and then you can use your android phone to control some gadgets such as: switch LED.
Note: The module doesnt suitable for IOS system.