Features:

• Supply Voltage: 5V
• Supply Current: 50mA
• Bluetooth Chip: CSR BC417143
• Bluetooth Protocol: Bluetooth Specification v2.0 + EDR
• USB Protocol: USB v1.1/2.0
• Operating Frequency: 2.4 to 2.48GHz unlicensed ISM band
• Modulation: GFSK (Gaussian Frequency Shift Keying)
• Transmit Power: 4dBm, Class 2
• Transmission Distance: 20 to 30m
• Sensitivity: -84dBm at 0.1% BER
• Transfer Rate: Asynchronous: 2.1Mbps (Max) / 160 kbps; Synchronous: 1Mbps/1Mbps
• Safety Features: authentication and encryption
• Serial Port Settings: 1200 ~ 1382400 / N / 8 / 1
• Default Baud Rate: 38400, Data bits: 8, Stop bit: 1,Parity: No parity, Data control: Yes
• Use CTS and RTS to control the data stream.
• When a rising pulse is detected in PIO0, device will be disconnected.
• Auto-connect the last device on power as default.
• Permit matched device connect by default. Default Pincode: 1234

Documents:

• AT Command Set
• Arduino Example Code