This is the popular HC-05 Bluetooth Serial Transceiver module which can be configured as master or slave Bluetooth device.We also stock the HC-06
Wireless Bluetooth RF Transceiver Module Serial RS232 HC-05 TTL
HC-05 Bluetooth Module - Electra
HC-05 Master/Slave 6pin Bluetooth Transceiver Module (With Button
HC-05 HC-06 Board Bluetooth Wireless Serial Transceiver Module
3.3V HC-05 Bluetooth Expansion Board HC05 Wireless Serial 6 Pin RF
ALAMSCN 2PCS HC-05 Wireless Bluetooth RF Transceiver Module TTL
HC-05 Bluetooth Wireless RS-232 Master / Slave RF Transceiver
Bluetooth Serial Transceiver Module Base Board for HC-06 HC-07 HC-05
Arduino ( HC-05 / HC-06 ) HC05/HC06 Wireless Bluetooth Serial Port
HC-05 wireless bluetooth RF transceiver module serial RS232 TTL
HC-05 6 Pin Wireless Bluetooth RF Transceiver Module for Arduino
Probots HC-05 Bluetooth Module Serial for Arduino Raspbery Pi Buy
HC-05 master-slave Bluetooth serial datalink module