HC-08 Bluetooth Serial Port Module 4.0 Low Power Consumption Current wireless Mobile phone serial communication module
It is a bluetooth 4.0 BLE module with 6 PIN base boards for Arduino also for your DIY wireless project. Leads interface includes VCC, GND, txd, rxd, status, EN
Only Slave mode. Compatible with iPhone 4s/5/5s 6/6s and android phones 4.3 or later.
Default rate : 9600, working voltage 3.3V to 6V. And you can modify the baud rate and the Bluetooth name via the at command.