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.
Mini Size.
Specifications:
Power input: +3.3VDC.
Signal coverage: 30ft
Size: 26.9mm×13mm×2.2 mm
Package Included:
1PCS * HC-06 30ft Wireless Bluetooth RF Transceiver Module RS232 TTL Module