It can be set to slave or master mode.
The module offers an affordable way to let your microcontroller talk to your Bluetooth devices such as Bluetooth mobile phones, laptop, and Bluetooth adapter. The Bluetooth module provides TTL level UART interface which is supported by almost every microcontroller in the market.
It is also designed to be compatible with most popular Arduino controller. Simply plug into Arduino IO Expansion Shield, a Bluetooth Arduino is ready to use.
Chips: CSR BC417143
Bluetooth Protocol: Bluetooth Specification v2.0 +EDR
Working Frequency: 2.4-2.48GHz unlicensed ISM Band
Modulation Mode: GFSK (Gaussian Frequency Shift Keying)
Power: ≤4dBm, Class 2
Transmission Distance: 20-30 in free space
Sensitivity: ≤-84 dBm at 0.1% BER
Transmission rate: Asynchronous: 2.1 Mbps (Max)/160 kbps; Synchronous: 1Mbps/1Mbps
Security: Authentication and encryption
Support profiles: Bluetooth serial port
LED indicator: LINK
Power Supply: +3.5V-+8V DC/50 mA
Working Temperature: -20°C-+55°C
Default serial setting: 115200/N/8/1
Default Pairing Code: 0000