This Bluetooth module can be used to establish a wireless serial connection between MCU, such as Arduino, and other devices. To pair the device to associate, used the configuration Master/Slave.

Technical specifications: 
Operating voltage: 3.3 ~ 6 V
Status LEDs (150 mA – 3.3V)
Search button
Compatible with Bluetooth devices via the Master/Slave configuration

Connection mode:
1.STATE
2.RXD
3.TXD
4.GND
5.VCC
6.EN
Strip Connection: 2.54mm
Dimensions: 1.55 x 3.98 cm