Here is my new Bluetooth module for Arduino.
Now I can use it to communicate with my Arduino from my PC or mobile phone.

My dear friend Tohid bought it from Massachusetts, USA, and I got it when I saw him here in Tehran.
Thanks Tohid.

Specifications:

• FCC Approved Class 2 BluetoothRadio Modem
• Extremely small radio – 0.15×0.6×1.9″
• Very robust link both in integrity and transmission distance (18m)
• Hardy frequency hopping scheme – operates in harsh RF environments like WiFi, 802.11g
• Encrypted connection
• Frequency: 2.4~2.524 GHz
• Operating Voltage: 3.3V-6V
• Serial communications: 2400-115200bps
• Operating Temperature: -40 ~ +70C
• Built-in antenna