The smallest dongle V2.1+EDR, Class II  or   class 1

1. General Radio: Bluetooth Class II, 20 meters (in open space) or 100M

2. Carrier Frequency: 2.4 ~ 2.483GHz Data Rate: Up to

3 Mbps 3. Bluetooth Standard: Bluetooth v2.0 + EDR

4. Spread Spectrum: FHSS

5. I/O Interface: USB v2.0 & 1.1

6. System Support: Windows 2000/XP/Vista

7. Dimensions: 21.6X14.3X5.4mm

8. Weight: 1 gram

9. LED Indicator: Single LED

10. Bounded Bluetooth Software: ivt 2.x  & ivt 5.x IVT Bluesoleil (Language Supported: English, Simplified Chinese, Traditional Chinese, Japanese, Korean, French, Italian, German, Spanish, Danish, Dutch, Finnish, Norwegian, Polish, Portuguese, Russian, Swedish)