It is HC-06.
TTL data transparent transfer between a host Bluetooth device.
Module HC-06 master and slave,two in one.
Build-in CSR company Bluetooth chip BC417143.
Bluetooth specification v2.0 + EDR.
Works with any USB Bluetooth adapters.
Default Baud Rate: 9600,8,1,n.
Coverage up to 30ft.
Built in antenna.